Move healthcheck endpoint to new file

actioner/web/__init__.py

@@ -1,11 +1,5 @@
 from aiohttp import web
-from actioner.clients import github
+from .healthcheck import healthcheck
-
-async def healthcheck(request):
-    return web.json_response({
-        'github': github.get_user().login
-    })
-
 
 def get_server():
     app = web.Application()

actioner/web/healthcheck.py

@@ -0,0 +1,8 @@
+from aiohttp import web
+from actioner.clients import github
+
+
+async def healthcheck(request):
+    return web.json_response({
+        'github': github.get_user().login
+    })