Do not build nginx image

Instead, just import the base image and customise it with volumes.

.gitignore

@@ -2,7 +2,7 @@
 config.json
 openedx/config/*.env.json
 openedx/config/*.auth.json
-nginx/config/*.conf
+config/rendered/nginx/*.conf
 mysql/config/database
 mysql/config/username
 mysql/config/password

configure

@@ -174,13 +174,13 @@ def main():
     # We need a different delimiter in nginx config files, because the '$' sign
     # is widely used there
     substitute(
-        os.path.join('nginx', 'config', 'templates', 'lms.conf.templ'),
-        os.path.join('nginx', 'config', 'lms.conf'),
+        os.path.join('config', 'templates', 'nginx', 'lms.conf.templ'),
+        os.path.join('config', 'rendered', 'nginx', 'lms.conf'),
         delimiter='£', **configurator.as_dict()
     )
     substitute(
-        os.path.join('nginx', 'config', 'templates', 'cms.conf.templ'),
-        os.path.join('nginx', 'config', 'cms.conf'),
+        os.path.join('config', 'templates', 'nginx', 'cms.conf.templ'),
+        os.path.join('config', 'rendered', 'nginx', 'cms.conf'),
         delimiter='£', **configurator.as_dict()
     )
 

docker-compose.yml

@@ -30,12 +30,12 @@ services:
       MYSQL_ROOT_PASSWORD_FILE: /etc/mysql/conf.d/openedx/password
 
   nginx:
-    build:
-      context: ./nginx
+    image: nginx:1.13
     restart: unless-stopped
     ports:
       - "80:80"
     volumes:
+      - ./config/rendered/nginx:/etc/nginx/conf.d/
       - ./data/lms:/openedx/data/lms:ro
       - ./data/cms:/openedx/data/cms:ro
 

nginx/Dockerfile

@@ -1,6 +0,0 @@
-FROM nginx:1.13
-VOLUME /openedx/data/lms
-VOLUME /openedx/data/cms
-
-COPY ./config/lms.conf /etc/nginx/conf.d/lms.conf
-COPY ./config/cms.conf /etc/nginx/conf.d/cms.conf