Dev: a reload waits at most five seconds for open connections

docker/compose.dev.yml

@@ -95,9 +95,11 @@ services:
       context: ..
       dockerfile: backend/Dockerfile
     # uvicorn itself, because `fastapi dev` cannot turn per-message deflate
-    # off, which `fluksio serve` does for the media frames. Watching the worker
-    # too makes a worker edit restart the engine, which respawns the local
-    # worker pool with the new code.
+    # off, which `fluksio serve` does for the media frames. A reload gives
+    # open connections five seconds: a device's socket that never finishes
+    # closing held the old process, and with it the reload, for good. Watching
+    # the worker too makes a worker edit restart the engine, which respawns the
+    # local worker pool with the new code.
     command:
       - uvicorn
       - fluksio.main:app
@@ -108,6 +110,8 @@ services:
       - "8000"
       - --ws-per-message-deflate
       - "false"
+      - --timeout-graceful-shutdown
+      - "5"
       - --reload-dir
       - /app/backend
       - --reload-dir