Add restart: unless-stopped to compose files

docker-compose.prod.yml

@@ -8,6 +8,7 @@ services:
       context: .
     image: websites4
     command: foreman start -f Procfile
+    restart: unless-stopped
     volumes:
       - .:/app
       - /var/www/e621-thumbnails:/data/e621-thumbnails

docker-compose.yml

@@ -5,6 +5,7 @@ services:
   websites:
     build: .
     image: websites4
+    restart: unless-stopped
     volumes:
       - .:/app
       - e621_thumbnail_data:/data/e621-thumbnails