Update docker-compose.yml

Needed to add this to get `docker-compose run auto-gpt` to run successfully

Author: droosma

docker-compose.yml

@@ -7,6 +7,8 @@ services:
     depends_on:
       - redis
     build: ./
+    env_file:
+      - .env
     volumes:
       - "./autogpt:/app"
       - ".env:/app/.env"