templates: add wp-content/cache to pre-created directories

Author: yosifkit

Dockerfile-alpine.template

@@ -81,8 +81,9 @@ RUN set -ex; \
 	rm wordpress.tar.gz; \
 	chown -R www-data:www-data /usr/src/wordpress; \
 # pre-create wp-content (and single-level children) for folks who want to bind-mount themes, etc so permissions are pre-created properly instead of root:root
+# wp-content/cache: https://github.com/docker-library/wordpress/issues/534#issuecomment-705733507
 	mkdir wp-content; \
-	for dir in /usr/src/wordpress/wp-content/*/; do \
+	for dir in /usr/src/wordpress/wp-content/*/ cache; do \
 		dir="$(basename "${dir%/}")"; \
 		mkdir "wp-content/$dir"; \
 	done; \

Dockerfile-debian.template

@@ -86,8 +86,9 @@ RUN set -ex; \
 	rm wordpress.tar.gz; \
 	chown -R www-data:www-data /usr/src/wordpress; \
 # pre-create wp-content (and single-level children) for folks who want to bind-mount themes, etc so permissions are pre-created properly instead of root:root
+# wp-content/cache: https://github.com/docker-library/wordpress/issues/534#issuecomment-705733507
 	mkdir wp-content; \
-	for dir in /usr/src/wordpress/wp-content/*/; do \
+	for dir in /usr/src/wordpress/wp-content/*/ cache; do \
 		dir="$(basename "${dir%/}")"; \
 		mkdir "wp-content/$dir"; \
 	done; \