refactor: Support running Docker container as root or non-root user

This commit introduces flexibility in the Docker setup by allowing the container to run either as the `root` user or a specified non-root user. It updates both the `docker-compose.yml` and `Dockerfile` to include environment variables for setting the user ID, group ID, username, and group name. Additionally, it modifies the entrypoint script to handle these configurations appropriately, ensuring compatibility with different user setups.

docker-compose.yml

@@ -45,6 +45,10 @@ services:
     image: sd-comfy:7
     environment:
       - CLI_ARGS=
+      - USE_UID=0
+      - USE_GID=0
+      - USE_USER=root
+      - USE_GROUP=root
 
 
   comfy-cpu: