Release context resources on UI shutdown (#1508)

Author: vchan

web/server/main.py

@@ -10,6 +10,7 @@
 from web.server.api.endpoints import api_router
 from web.server.console import api_console
 from web.server.exceptions import ApiException
+from web.server.settings import get_context, get_settings
 from web.server.watcher import watch_project
 
 app = FastAPI()
@@ -39,9 +40,11 @@ async def dispatch() -> None:
 
 
 @app.on_event("shutdown")
-def shutdown_event() -> None:
+async def shutdown_event() -> None:
     app.state.dispatch_task.cancel()
     app.state.watch_task.cancel()
+    context = await get_context(settings=get_settings())
+    context.close()
 
 
 @app.exception_handler(ApiException)