diff --git a/.travis.yml b/.travis.yml
index c3deb52c..aceb543f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,14 +10,20 @@ install:
 
 before_script:
   - env | sort
+  - wget -qO- 'https://github.com/tianon/pgp-happy-eyeballs/raw/master/hack-my-builds.sh' | bash
   - cd "$VERSION"
   - image="$(awk '$1 == "FROM" { print $2; exit }' passenger/Dockerfile)"
 
 script:
-  - travis_retry docker build -t "$image" .
-  - ~/official-images/test/run.sh "$image"
-  - travis_retry docker build -t "$image-passenger" passenger
-  - ~/official-images/test/run.sh "$image-passenger"
+  - |
+    (
+      set -Eeuo pipefail
+      set -x
+      docker build -t "$image" .
+      ~/official-images/test/run.sh "$image"
+      docker build -t "$image-passenger" passenger
+      ~/official-images/test/run.sh "$image-passenger"
+    )
 
 after_script:
   - docker images
diff --git a/3.3/Dockerfile b/3.3/Dockerfile
index 981122b7..b37a6ed9 100644
--- a/3.3/Dockerfile
+++ b/3.3/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:2.3-slim-jessie
+FROM ruby:2.3-slim-stretch
 
 # add our user and group first to make sure their IDs get assigned consistently, regardless of whatever dependencies get added
 RUN groupadd -r redmine && useradd -r -g redmine redmine
@@ -6,33 +6,7 @@ RUN groupadd -r redmine && useradd -r -g redmine redmine
 RUN apt-get update && apt-get install -y --no-install-recommends \
 		ca-certificates \
 		wget \
-	&& rm -rf /var/lib/apt/lists/*
-
-# grab gosu for easy step-down from root
-ENV GOSU_VERSION 1.10
-RUN set -x \
-	&& wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$(dpkg --print-architecture)" \
-	&& wget -O /usr/local/bin/gosu.asc "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$(dpkg --print-architecture).asc" \
-	&& export GNUPGHOME="$(mktemp -d)" \
-	&& gpg --keyserver ha.pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4 \
-	&& gpg --batch --verify /usr/local/bin/gosu.asc /usr/local/bin/gosu \
-	&& rm -r "$GNUPGHOME" /usr/local/bin/gosu.asc \
-	&& chmod +x /usr/local/bin/gosu \
-	&& gosu nobody true
-
-# grab tini for signal processing and zombie killing
-ENV TINI_VERSION v0.16.1
-RUN set -x \
-	&& wget -O /usr/local/bin/tini "https://github.com/krallin/tini/releases/download/$TINI_VERSION/tini-$(dpkg --print-architecture)" \
-	&& wget -O /usr/local/bin/tini.asc "https://github.com/krallin/tini/releases/download/$TINI_VERSION/tini-$(dpkg --print-architecture).asc" \
-	&& export GNUPGHOME="$(mktemp -d)" \
-	&& gpg --keyserver ha.pool.sks-keyservers.net --recv-keys 6380DC428747F6C393FEACA59A84159D7001A4E5 \
-	&& gpg --batch --verify /usr/local/bin/tini.asc /usr/local/bin/tini \
-	&& rm -r "$GNUPGHOME" /usr/local/bin/tini.asc \
-	&& chmod +x /usr/local/bin/tini \
-	&& tini -h
-
-RUN apt-get update && apt-get install -y --no-install-recommends \
+		\
 		bzr \
 		git \
 		imagemagick \
@@ -41,6 +15,48 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 		subversion \
 	&& rm -rf /var/lib/apt/lists/*
 
+RUN set -eux; \
+	savedAptMark="$(apt-mark showmanual)"; \
+	apt-get update; \
+	apt-get install -y --no-install-recommends \
+		dirmngr \
+		gnupg \
+	; \
+	rm -rf /var/lib/apt/lists/*; \
+	\
+	dpkgArch="$(dpkg --print-architecture | awk -F- '{ print $NF }')"; \
+	\
+# grab gosu for easy step-down from root
+# https://github.com/tianon/gosu/releases
+	export GOSU_VERSION='1.10'; \
+	wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$dpkgArch"; \
+	wget -O /usr/local/bin/gosu.asc "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$dpkgArch.asc"; \
+	export GNUPGHOME="$(mktemp -d)"; \
+	gpg --keyserver ha.pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4; \
+	gpg --batch --verify /usr/local/bin/gosu.asc /usr/local/bin/gosu; \
+	gpgconf --kill all; \
+	rm -r "$GNUPGHOME" /usr/local/bin/gosu.asc; \
+	chmod +x /usr/local/bin/gosu; \
+	gosu nobody true; \
+	\
+# grab tini for signal processing and zombie killing
+# https://github.com/krallin/tini/releases
+	export TINI_VERSION='0.18.0'; \
+	wget -O /usr/local/bin/tini "https://github.com/krallin/tini/releases/download/v$TINI_VERSION/tini-$dpkgArch"; \
+	wget -O /usr/local/bin/tini.asc "https://github.com/krallin/tini/releases/download/v$TINI_VERSION/tini-$dpkgArch.asc"; \
+	export GNUPGHOME="$(mktemp -d)"; \
+	gpg --keyserver ha.pool.sks-keyservers.net --recv-keys 6380DC428747F6C393FEACA59A84159D7001A4E5; \
+	gpg --batch --verify /usr/local/bin/tini.asc /usr/local/bin/tini; \
+	gpgconf --kill all; \
+	rm -r "$GNUPGHOME" /usr/local/bin/tini.asc; \
+	chmod +x /usr/local/bin/tini; \
+	tini -h; \
+	\
+# reset apt-mark's "manual" list so that "purge --auto-remove" will remove all build dependencies
+	apt-mark auto '.*' > /dev/null; \
+	[ -z "$savedAptMark" ] || apt-mark manual $savedAptMark; \
+	apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false
+
 ENV RAILS_ENV production
 WORKDIR /usr/src/redmine
 
@@ -59,18 +75,36 @@ RUN set -eux; \
 	savedAptMark="$(apt-mark showmanual)"; \
 	apt-get update; \
 	apt-get install -y --no-install-recommends \
-		freetds-dev \
+		dpkg-dev \
 		gcc \
 		libmagickcore-dev \
 		libmagickwand-dev \
-		libmysqlclient-dev \
+		libmariadbclient-dev \
 		libpq-dev \
 		libsqlite3-dev \
 		make \
 		patch \
+		\
+# tiny_tds 1.0.x requires OpenSSL 1.0
+# see https://github.com/rails-sqlserver/tiny_tds/commit/3269dd3bcfbe4201ab51aa2870a6aaddfcbdfa5d (tiny_tds 1.2.x+ is required for OpenSSL 1.1 support)
+		libssl1.0-dev \
 	; \
 	rm -rf /var/lib/apt/lists/*; \
 	\
+# https://github.com/travis-ci/travis-ci/issues/9391 (can't let "tiny_tds" download FreeTDS for us because FTP)
+# https://github.com/rails-sqlserver/tiny_tds/pull/384 (newer version uses HTTP!)
+# https://github.com/rails-sqlserver/tiny_tds/pull/345 (... but then can't download it for us)
+# http://www.freetds.org/files/stable/?C=M;O=D
+# (if/when we update to Debian Buster and thus get FreeTDS newer than 0.95 in the distro, we can switch back to simply installing "freetds-dev" from Debian)
+	wget -O freetds.tar.bz2 'http://www.freetds.org/files/stable/freetds-1.00.91.tar.bz2'; \
+	echo '8d71f9f29be0fe0637e443dd3807b3fd *freetds.tar.bz2' | md5sum -c -; \
+	mkdir freetds; \
+	tar -xf freetds.tar.bz2 -C freetds --strip-components=1; \
+	rm freetds.tar.bz2; \
+	( cd freetds && gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" && ./configure --build="$gnuArch" --enable-silent-rules && make -j "$(nproc)" && make -C src install && make -C include install ); \
+	rm -rf freetds; \
+	bundle config build.tiny_tds --enable-system-freetds; \
+	\
 	bundle install --without development test; \
 	for adapter in mysql2 postgresql sqlserver sqlite3; do \
 		echo "$RAILS_ENV:" > ./config/database.yml; \
diff --git a/3.4/Dockerfile b/3.4/Dockerfile
index bc8c25c3..270921be 100644
--- a/3.4/Dockerfile
+++ b/3.4/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:2.4-slim-jessie
+FROM ruby:2.4-slim-stretch
 
 # add our user and group first to make sure their IDs get assigned consistently, regardless of whatever dependencies get added
 RUN groupadd -r redmine && useradd -r -g redmine redmine
@@ -6,33 +6,7 @@ RUN groupadd -r redmine && useradd -r -g redmine redmine
 RUN apt-get update && apt-get install -y --no-install-recommends \
 		ca-certificates \
 		wget \
-	&& rm -rf /var/lib/apt/lists/*
-
-# grab gosu for easy step-down from root
-ENV GOSU_VERSION 1.10
-RUN set -x \
-	&& wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$(dpkg --print-architecture)" \
-	&& wget -O /usr/local/bin/gosu.asc "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$(dpkg --print-architecture).asc" \
-	&& export GNUPGHOME="$(mktemp -d)" \
-	&& gpg --keyserver ha.pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4 \
-	&& gpg --batch --verify /usr/local/bin/gosu.asc /usr/local/bin/gosu \
-	&& rm -r "$GNUPGHOME" /usr/local/bin/gosu.asc \
-	&& chmod +x /usr/local/bin/gosu \
-	&& gosu nobody true
-
-# grab tini for signal processing and zombie killing
-ENV TINI_VERSION v0.16.1
-RUN set -x \
-	&& wget -O /usr/local/bin/tini "https://github.com/krallin/tini/releases/download/$TINI_VERSION/tini-$(dpkg --print-architecture)" \
-	&& wget -O /usr/local/bin/tini.asc "https://github.com/krallin/tini/releases/download/$TINI_VERSION/tini-$(dpkg --print-architecture).asc" \
-	&& export GNUPGHOME="$(mktemp -d)" \
-	&& gpg --keyserver ha.pool.sks-keyservers.net --recv-keys 6380DC428747F6C393FEACA59A84159D7001A4E5 \
-	&& gpg --batch --verify /usr/local/bin/tini.asc /usr/local/bin/tini \
-	&& rm -r "$GNUPGHOME" /usr/local/bin/tini.asc \
-	&& chmod +x /usr/local/bin/tini \
-	&& tini -h
-
-RUN apt-get update && apt-get install -y --no-install-recommends \
+		\
 		bzr \
 		git \
 		imagemagick \
@@ -41,6 +15,48 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 		subversion \
 	&& rm -rf /var/lib/apt/lists/*
 
+RUN set -eux; \
+	savedAptMark="$(apt-mark showmanual)"; \
+	apt-get update; \
+	apt-get install -y --no-install-recommends \
+		dirmngr \
+		gnupg \
+	; \
+	rm -rf /var/lib/apt/lists/*; \
+	\
+	dpkgArch="$(dpkg --print-architecture | awk -F- '{ print $NF }')"; \
+	\
+# grab gosu for easy step-down from root
+# https://github.com/tianon/gosu/releases
+	export GOSU_VERSION='1.10'; \
+	wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$dpkgArch"; \
+	wget -O /usr/local/bin/gosu.asc "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$dpkgArch.asc"; \
+	export GNUPGHOME="$(mktemp -d)"; \
+	gpg --keyserver ha.pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4; \
+	gpg --batch --verify /usr/local/bin/gosu.asc /usr/local/bin/gosu; \
+	gpgconf --kill all; \
+	rm -r "$GNUPGHOME" /usr/local/bin/gosu.asc; \
+	chmod +x /usr/local/bin/gosu; \
+	gosu nobody true; \
+	\
+# grab tini for signal processing and zombie killing
+# https://github.com/krallin/tini/releases
+	export TINI_VERSION='0.18.0'; \
+	wget -O /usr/local/bin/tini "https://github.com/krallin/tini/releases/download/v$TINI_VERSION/tini-$dpkgArch"; \
+	wget -O /usr/local/bin/tini.asc "https://github.com/krallin/tini/releases/download/v$TINI_VERSION/tini-$dpkgArch.asc"; \
+	export GNUPGHOME="$(mktemp -d)"; \
+	gpg --keyserver ha.pool.sks-keyservers.net --recv-keys 6380DC428747F6C393FEACA59A84159D7001A4E5; \
+	gpg --batch --verify /usr/local/bin/tini.asc /usr/local/bin/tini; \
+	gpgconf --kill all; \
+	rm -r "$GNUPGHOME" /usr/local/bin/tini.asc; \
+	chmod +x /usr/local/bin/tini; \
+	tini -h; \
+	\
+# reset apt-mark's "manual" list so that "purge --auto-remove" will remove all build dependencies
+	apt-mark auto '.*' > /dev/null; \
+	[ -z "$savedAptMark" ] || apt-mark manual $savedAptMark; \
+	apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false
+
 ENV RAILS_ENV production
 WORKDIR /usr/src/redmine
 
@@ -59,18 +75,36 @@ RUN set -eux; \
 	savedAptMark="$(apt-mark showmanual)"; \
 	apt-get update; \
 	apt-get install -y --no-install-recommends \
-		freetds-dev \
+		dpkg-dev \
 		gcc \
 		libmagickcore-dev \
 		libmagickwand-dev \
-		libmysqlclient-dev \
+		libmariadbclient-dev \
 		libpq-dev \
 		libsqlite3-dev \
 		make \
 		patch \
+		\
+# tiny_tds 1.0.x requires OpenSSL 1.0
+# see https://github.com/rails-sqlserver/tiny_tds/commit/3269dd3bcfbe4201ab51aa2870a6aaddfcbdfa5d (tiny_tds 1.2.x+ is required for OpenSSL 1.1 support)
+		libssl1.0-dev \
 	; \
 	rm -rf /var/lib/apt/lists/*; \
 	\
+# https://github.com/travis-ci/travis-ci/issues/9391 (can't let "tiny_tds" download FreeTDS for us because FTP)
+# https://github.com/rails-sqlserver/tiny_tds/pull/384 (newer version uses HTTP!)
+# https://github.com/rails-sqlserver/tiny_tds/pull/345 (... but then can't download it for us)
+# http://www.freetds.org/files/stable/?C=M;O=D
+# (if/when we update to Debian Buster and thus get FreeTDS newer than 0.95 in the distro, we can switch back to simply installing "freetds-dev" from Debian)
+	wget -O freetds.tar.bz2 'http://www.freetds.org/files/stable/freetds-1.00.91.tar.bz2'; \
+	echo '8d71f9f29be0fe0637e443dd3807b3fd *freetds.tar.bz2' | md5sum -c -; \
+	mkdir freetds; \
+	tar -xf freetds.tar.bz2 -C freetds --strip-components=1; \
+	rm freetds.tar.bz2; \
+	( cd freetds && gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" && ./configure --build="$gnuArch" --enable-silent-rules && make -j "$(nproc)" && make -C src install && make -C include install ); \
+	rm -rf freetds; \
+	bundle config build.tiny_tds --enable-system-freetds; \
+	\
 	bundle install --without development test; \
 	for adapter in mysql2 postgresql sqlserver sqlite3; do \
 		echo "$RAILS_ENV:" > ./config/database.yml; \
diff --git a/Dockerfile.template b/Dockerfile.template
index 741937ea..45c29e95 100644
--- a/Dockerfile.template
+++ b/Dockerfile.template
@@ -1,4 +1,4 @@
-FROM ruby:%%RUBY_VERSION%%-slim-jessie
+FROM ruby:%%RUBY_VERSION%%-slim-stretch
 
 # add our user and group first to make sure their IDs get assigned consistently, regardless of whatever dependencies get added
 RUN groupadd -r redmine && useradd -r -g redmine redmine
@@ -6,33 +6,7 @@ RUN groupadd -r redmine && useradd -r -g redmine redmine
 RUN apt-get update && apt-get install -y --no-install-recommends \
 		ca-certificates \
 		wget \
-	&& rm -rf /var/lib/apt/lists/*
-
-# grab gosu for easy step-down from root
-ENV GOSU_VERSION 1.10
-RUN set -x \
-	&& wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$(dpkg --print-architecture)" \
-	&& wget -O /usr/local/bin/gosu.asc "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$(dpkg --print-architecture).asc" \
-	&& export GNUPGHOME="$(mktemp -d)" \
-	&& gpg --keyserver ha.pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4 \
-	&& gpg --batch --verify /usr/local/bin/gosu.asc /usr/local/bin/gosu \
-	&& rm -r "$GNUPGHOME" /usr/local/bin/gosu.asc \
-	&& chmod +x /usr/local/bin/gosu \
-	&& gosu nobody true
-
-# grab tini for signal processing and zombie killing
-ENV TINI_VERSION v0.16.1
-RUN set -x \
-	&& wget -O /usr/local/bin/tini "https://github.com/krallin/tini/releases/download/$TINI_VERSION/tini-$(dpkg --print-architecture)" \
-	&& wget -O /usr/local/bin/tini.asc "https://github.com/krallin/tini/releases/download/$TINI_VERSION/tini-$(dpkg --print-architecture).asc" \
-	&& export GNUPGHOME="$(mktemp -d)" \
-	&& gpg --keyserver ha.pool.sks-keyservers.net --recv-keys 6380DC428747F6C393FEACA59A84159D7001A4E5 \
-	&& gpg --batch --verify /usr/local/bin/tini.asc /usr/local/bin/tini \
-	&& rm -r "$GNUPGHOME" /usr/local/bin/tini.asc \
-	&& chmod +x /usr/local/bin/tini \
-	&& tini -h
-
-RUN apt-get update && apt-get install -y --no-install-recommends \
+		\
 		bzr \
 		git \
 		imagemagick \
@@ -41,6 +15,48 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 		subversion \
 	&& rm -rf /var/lib/apt/lists/*
 
+RUN set -eux; \
+	savedAptMark="$(apt-mark showmanual)"; \
+	apt-get update; \
+	apt-get install -y --no-install-recommends \
+		dirmngr \
+		gnupg \
+	; \
+	rm -rf /var/lib/apt/lists/*; \
+	\
+	dpkgArch="$(dpkg --print-architecture | awk -F- '{ print $NF }')"; \
+	\
+# grab gosu for easy step-down from root
+# https://github.com/tianon/gosu/releases
+	export GOSU_VERSION='1.10'; \
+	wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$dpkgArch"; \
+	wget -O /usr/local/bin/gosu.asc "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$dpkgArch.asc"; \
+	export GNUPGHOME="$(mktemp -d)"; \
+	gpg --keyserver ha.pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4; \
+	gpg --batch --verify /usr/local/bin/gosu.asc /usr/local/bin/gosu; \
+	gpgconf --kill all; \
+	rm -r "$GNUPGHOME" /usr/local/bin/gosu.asc; \
+	chmod +x /usr/local/bin/gosu; \
+	gosu nobody true; \
+	\
+# grab tini for signal processing and zombie killing
+# https://github.com/krallin/tini/releases
+	export TINI_VERSION='0.18.0'; \
+	wget -O /usr/local/bin/tini "https://github.com/krallin/tini/releases/download/v$TINI_VERSION/tini-$dpkgArch"; \
+	wget -O /usr/local/bin/tini.asc "https://github.com/krallin/tini/releases/download/v$TINI_VERSION/tini-$dpkgArch.asc"; \
+	export GNUPGHOME="$(mktemp -d)"; \
+	gpg --keyserver ha.pool.sks-keyservers.net --recv-keys 6380DC428747F6C393FEACA59A84159D7001A4E5; \
+	gpg --batch --verify /usr/local/bin/tini.asc /usr/local/bin/tini; \
+	gpgconf --kill all; \
+	rm -r "$GNUPGHOME" /usr/local/bin/tini.asc; \
+	chmod +x /usr/local/bin/tini; \
+	tini -h; \
+	\
+# reset apt-mark's "manual" list so that "purge --auto-remove" will remove all build dependencies
+	apt-mark auto '.*' > /dev/null; \
+	[ -z "$savedAptMark" ] || apt-mark manual $savedAptMark; \
+	apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false
+
 ENV RAILS_ENV production
 WORKDIR /usr/src/redmine
 
@@ -59,18 +75,36 @@ RUN set -eux; \
 	savedAptMark="$(apt-mark showmanual)"; \
 	apt-get update; \
 	apt-get install -y --no-install-recommends \
-		freetds-dev \
+		dpkg-dev \
 		gcc \
 		libmagickcore-dev \
 		libmagickwand-dev \
-		libmysqlclient-dev \
+		libmariadbclient-dev \
 		libpq-dev \
 		libsqlite3-dev \
 		make \
 		patch \
+		\
+# tiny_tds 1.0.x requires OpenSSL 1.0
+# see https://github.com/rails-sqlserver/tiny_tds/commit/3269dd3bcfbe4201ab51aa2870a6aaddfcbdfa5d (tiny_tds 1.2.x+ is required for OpenSSL 1.1 support)
+		libssl1.0-dev \
 	; \
 	rm -rf /var/lib/apt/lists/*; \
 	\
+# https://github.com/travis-ci/travis-ci/issues/9391 (can't let "tiny_tds" download FreeTDS for us because FTP)
+# https://github.com/rails-sqlserver/tiny_tds/pull/384 (newer version uses HTTP!)
+# https://github.com/rails-sqlserver/tiny_tds/pull/345 (... but then can't download it for us)
+# http://www.freetds.org/files/stable/?C=M;O=D
+# (if/when we update to Debian Buster and thus get FreeTDS newer than 0.95 in the distro, we can switch back to simply installing "freetds-dev" from Debian)
+	wget -O freetds.tar.bz2 'http://www.freetds.org/files/stable/freetds-1.00.91.tar.bz2'; \
+	echo '8d71f9f29be0fe0637e443dd3807b3fd *freetds.tar.bz2' | md5sum -c -; \
+	mkdir freetds; \
+	tar -xf freetds.tar.bz2 -C freetds --strip-components=1; \
+	rm freetds.tar.bz2; \
+	( cd freetds && gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" && ./configure --build="$gnuArch" --enable-silent-rules && make -j "$(nproc)" && make -C src install && make -C include install ); \
+	rm -rf freetds; \
+	bundle config build.tiny_tds --enable-system-freetds; \
+	\
 	bundle install --without development test; \
 	for adapter in mysql2 postgresql sqlserver sqlite3; do \
 		echo "$RAILS_ENV:" > ./config/database.yml; \