fix: use firefox, remove db container

docker-compose.yml

@@ -1,4 +1,3 @@
-version: '3.8'
 services:
   app:
     build: ./app
@@ -6,22 +5,5 @@ services:
       - "8000:8000"
     env_file:
       - .env
-    depends_on:
-      - db
     volumes:
-      - ./app:/app
-      - /app/.venv
-
-  db:
-    image: postgres:15
-    environment:
-    POSTGRES_USER: ${POSTGRES_USER}
-    POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
-    POSTGRES_DB: ${POSTGRES_DB}
-    ports:
-      - "5432:5432"
-    volumes:
-      - pgdata:/var/lib/postgresql/data
-
-volumes:
-  pgdata:
+      - ./app:/app