IMAGE_DEPS := $(IMAGE_DEPS) \
app/wordpress/wordpress_db_password \
app/wordpress/wordpress_db_root_password

app/wordpress/wordpress_db_password: $(apps_config)
	bash -c 'source $(apps_config); printf "%s\n" "$$WORDPRESS_DB_PASSWORD" > $@'
app/wordpress/wordpress_db_root_password: $(apps_config)
	bash -c 'source $(apps_config); printf "%s\n" "$$WORDPRESS_DB_ROOT_PASSWORD" > $@'