Fixes ytorg/Yotter#87 and removes redundant ports option

Dockerfile

@@ -29,7 +29,8 @@ RUN flask db init \
   && flask db migrate \
   && flask db upgrade
 
-CMD flask db migrate \
+CMD flask db stamp head \
+  && flask db migrate \
   && flask db upgrade \
   && gunicorn -b 0.0.0.0:5000 -w 4 yotter:app
 

docker-compose.yml

@@ -21,8 +21,6 @@ services:
       DATABASE_URL: mysql+pymysql://yotter:changeme@mariadb:3306/yotter
     depends_on:
       - mariadb
-    ports:
-      - "5000:5000"
     volumes:
      - migrations:/usr/src/app/migrations
      - ./yotter-config.json:/usr/src/app/yotter-config.json