Drop docker-compose version 1 support

Close #138

docker-compose-v1.yml

@@ -1,48 +0,0 @@
-db:
-  build: db
-  restart: unless-stopped
-  volumes:
-    - ./volumes/db/var/lib/postgresql/data:/var/lib/postgresql/data
-    - /etc/localtime:/etc/localtime:ro
-  environment:
-    - POSTGRES_USER=mmuser
-    - POSTGRES_PASSWORD=mmuser_password
-    - POSTGRES_DB=mattermost
-  # uncomment the following to enable backup
-  #  - AWS_ACCESS_KEY_ID=XXXX
-  #  - AWS_SECRET_ACCESS_KEY=XXXX
-  #  - WALE_S3_PREFIX=s3://BUCKET_NAME/PATH
-  #  - AWS_REGION=us-east-1
-  #  in case your config is not in default location
-  #  - MM_CONFIG=/mattermost/config/config.jso
-app:
-  build:
-    context: app
-    # comment out for team version
-    dockerfile: Dockerfile-enterprise
-  links:
-    - db:db
-  restart: unless-stopped
-  volumes:
-    - ./volumes/app/mattermost/config:/mattermost/config:rw
-    - ./volumes/app/mattermost/data:/mattermost/data:rw
-    - ./volumes/app/mattermost/logs:/mattermost/logs:rw
-    - /etc/localtime:/etc/localtime:ro
-  environment:
-  # set same as db environment
-    - MM_USERNAME=mmuser
-    - MM_PASSWORD=mmuser_password
-    - MM_DBNAME=mattermost
-
-web:
-  build: web
-  ports:
-    - "80:80"
-    - "443:443"
-  links:
-    - app:app
-  restart: unless-stopped
-  volumes:
-      # This directory must have cert files
-    - ./volumes/web/cert:/cert:ro
-    - /etc/localtime:/etc/localtime:ro