Fixed docker container linking

docker-compose.yml

@@ -2,31 +2,30 @@ version: '3'
 
 services:
   siren:
-    image: siren
+    image: siren:${SIREN_VERSION}
     container_name: siren
     build:
       context: .
       dockerfile: ./Dockerfile
       args:
         - VERSION=${SIREN_VERSION}
-    volumes:
-      - ./app:/usr/src/siren
+    #volumes:
+    #  - ./app:/siren
     environment:
       DISCORD_TOKEN: ${DISCORD_TOKEN}
-      DATABASE_URL: jdbc:postgresql://db:5432/${POSTGRES_DB}
-      DATABASE_USERNAME: ${POSTGRES_USER}
-      DATABASE_PASSWORD: ${POSTGRES_PASSWORD}
+      DATABASE_URL: postgresql://${POSTGRES_USER}:${POSTGRES_PASSWORD}@db/${POSTGRES_DB}
     depends_on:
       - db
     restart: unless-stopped
   db:
     image: postgres:latest
+    container_name: siren_db
     environment:
       POSTGRES_USER: ${POSTGRES_USER}
       POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
       POSTGRES_DB: ${POSTGRES_DB}
-    volumes:
-      - ./data:/var/lib/postgresql/data
+    #volumes:
+    #  - ./data:/var/lib/postgresql/data
     ports:
       - "5432:5432"
-    restart: unless-stopped
+    restart: unless-stopped