Proxy not forwarding to correct notebook server

I am trying to setup Jupyterhub on AWS but I keep running into an issue where the notebook server is spawned correctly. The IP published on the logs are correct and I am able to visit the public port of the notebook server. But the url `/user//` doesn't forward to the notebook server correctly. I am wondering what else I am missing here.
```

[I 2017-10-18 12:13:27.930 JupyterHub base:446] User gbalaraman took 3.381 seconds to start
[I 2017-10-18 12:13:27.931 JupyterHub proxy:231] Adding user gbalaraman to proxy /user/gbalaraman/ => http://:32773
12:13:27.971 - info: [ConfigProxy] Adding route /user/gbalaraman -> http://:32773
12:13:27.972 - info: [ConfigProxy] 201 POST /api/routes/user/gbalaraman
[I 2017-10-18 12:13:27.976 JupyterHub log:122] 302 GET /hub/user/gbalaraman/ → /user/gbalaraman/?redirects=1 (gbalaraman@::ffff:4**.1*8.**7.**1) 3428.58ms
[I 2017-10-18 12:17:33.139 JupyterHub log:122] 302 GET /static/components/jquery-ui/themes/smoothness/jquery-ui.min.css?v=d172b560b073f3bc42fea160bbff96a2 → /hub/static/components/jquery-ui/themes/smoothness/jquery-ui.min.css?v=d172b560b073f3bc42fea160bbff96a2 (@::ffff:4**.1*8.**7.**1) 0.55ms
[I 2017-10-18 12:17:33.145 JupyterHub log:122] 302 GET /static/style/style.min.css?v=fd2220be4cc17416b538bf7fb9ae2339 → /hub/static/style/style.min.css?v=fd2220be4cc17416b538bf7fb9ae2339 (@::ffff:4**.1*8.**7.**1) 0.41ms
[I 2017-10-18 12:17:33.146 JupyterHub log:122] 302 GET /static/custom/custom.css?v=900035aa0c126bb85df55c5b3e51b6f1 → /hub/static/custom/custom.css?v=900035aa0c126bb85df55c5b3e51b6f1 (@::ffff:4**.1*8.**7.**1) 0.35ms
[I 2017-10-18 12:17:33.148 JupyterHub log:122] 302 GET /static/components/requirejs/require.js?v=07d7db4d3fd6519996822665e4239282 → /hub/static/components/requirejs/require.js?v=07d7db4d3fd6519996822665e4239282 (@::ffff:4**.1*8.**7.**1) 0.35ms
[W 2017-10-18 12:17:33.222 JupyterHub log:122] 404 GET /hub/static/components/jquery-ui/themes/smoothness/jquery-ui.min.css?v=d172b560b073f3bc42fea160bbff96a2 (@::ffff:4**.1*8.**7.**1) 0.63ms
[W 2017-10-18 12:17:33.226 JupyterHub log:122] 404 GET /hub/static/style/style.min.css?v=fd2220be4cc17416b538bf7fb9ae2339 (@::ffff:4**.1*8.**7.**1) 0.43ms
```

I think there is an issue with the way proxy server is configured. Not sure how to address it. Would appreciate any help with this.

`

Start with the JupyterHub proxy route and AWS deployment configuration described in the logs, especially the /user// route and the redirects to /hub/static/. Reproduce the routing and static-asset requests, then verify that the user URL reaches the notebook server without the reported 404 responses.

Written by the indexing model from the issue text.