Simplify migrations and static collection

Migrations and static assets collection are no longer performed every
time we build an image. Instead, they are run on command.

Makefile

@@ -0,0 +1,4 @@
+migrate:
+	docker-compose run lms ./manage.py lms migrate --settings=production
+assets:
+	docker-compose run lms paver update_assets lms --settings=production

README.md

@@ -17,6 +17,11 @@ Create necessary data folders:
 
 The LMS will be reachable at the following url: [http://openedx.localhost](http://openedx.localhost).
 
+On the first run you will need to migrate the database and collect static assets:
+
+    make migrate
+    make assets
+
 ## Development tips & tricks
 
 Open a bash in the lms:

docker-compose.yml

@@ -35,9 +35,6 @@ services:
   lms:
     build:
       context: ./lms
-      args:
-        RUN_MIGRATIONS: 1
-        COLLECT_STATIC: 1
     volumes:
       - ./data/lms/course_static:/openedx/course_static
       - ./data/lms/data:/openedx/data

lms/Dockerfile

@@ -53,16 +53,4 @@ ENV SERVICE_VARIANT lms
 
 # Run server
 EXPOSE 8000
-
-# Migrate
-ARG RUN_MIGRATIONS=0
-ENV RUN_MIGRATIONS ${RUN_MIGRATIONS}
-# Collect static assets
-ARG COLLECT_STATIC=0
-ENV COLLECT_STATIC ${COLLECT_STATIC}
-
-# TODO Here we wait until mysql and mongodb become available but it's a terrible solution
-CMD sleep 5 && \
-  if [ "$RUN_MIGRATIONS" = "1" ] ; then ./manage.py lms migrate --settings=production ; fi && \
-  if [ "$COLLECT_STATIC" = "1" ] ; then paver update_assets lms --settings=production ; fi && \
-  gunicorn --name lms --bind=0.0.0.0:8000 --max-requests=1000 lms.wsgi:application
+CMD gunicorn --name lms --bind=0.0.0.0:8000 --max-requests=1000 lms.wsgi:application