Fix vapid command in docker-compose.yml

Fix #60

Author: p1gp1g

docker-compose.yml

@@ -1,5 +1,3 @@
-version: "3"
-
 services:
   mollysocket:
     image: ghcr.io/mollyim/mollysocket:1
@@ -15,7 +13,7 @@ services:
       - MOLLY_ALLOWED_ENDPOINTS=["*"]
       - MOLLY_ALLOWED_UUIDS=["*"]
       # TODO:
-      #- MOLLY_VAPID_PRIVKEY="paste output of `docker compose mollysocket vapid gen` here"
+      #- MOLLY_VAPID_PRIVKEY="paste output of `docker compose exec mollysocket mollysocket vapid gen` here"
       - MOLLY_HOST=0.0.0.0
       - MOLLY_PORT=8020
       - RUST_LOG=info