Add healthcheck endpoint

actioner/main.py

@@ -9,7 +9,6 @@ def main():
     server = get_server()
     web_process = Process(target=run_web_app, args=(server,))
     web_process.start()
-    web_process.join()
 
 
 if __name__ == '__main__':

actioner/web/__init__.py

@@ -1,6 +1,11 @@
 from aiohttp import web
 
 
+async def healthcheck(request):
+    return web.json_response({})
+
+
 def get_server():
     app = web.Application()
+    app.router.add_get("/healthcheck", healthcheck)
     return app