env files, fixes for discogs sync

docker-compose.yaml

@@ -4,9 +4,9 @@ services:
   pg:
     image: postgres:latest
     environment:
-      POSTGRES_USER: 'mcrates'
-      POSTGRES_DB: 'mcrates'
-      POSTGRES_PASSWORD: 'digdeep'
+      POSTGRES_USER: '${POSTGRES_USER}'
+      POSTGRES_DB: '${POSTGRES_DB}'
+      POSTGRES_PASSWORD: '${POSTGRES_PASSWORD}'
     ports:
       - '45432:5432'
     volumes:
@@ -19,7 +19,7 @@ services:
       - 'pg'
     entrypoint: npm start
     environment:
-      DATABASE_URL: 'postgresql://mcrates:digdeep@pg:5432/mcrates?schema=public'
+      DATABASE_URL: 'postgresql://${POSTGRES_USER}:${POSTGRES_PASSWORD}@pg:5432/${POSTGRES_DB}?schema=public'
     volumes:
       - "./api:/opt/mcrates/api"