# Docker subfolder install not working due to Ember-CLI proxy error?

**URL:** <https://meta.discourse.org/t/docker-subfolder-install-not-working-due-to-ember-cli-proxy-error/242217>\
**Category:** Self-hosting\
**Tags:** unsupported-install, docker\
**Created:** [October 18, 2022, 3:40pm UTC](https://meta.discourse.org/t/docker-subfolder-install-not-working-due-to-ember-cli-proxy-error/242217 "2022-10-18T15:40:57Z")\
**Posts on this page:** 1\
**Showing post:** 7

<div class="post-metadata">

**Author:** ![merefield](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/merefield/32/176214_2.png) [@merefield](https://meta.discourse.org/u/merefield)\
**Post date:** [October 18, 2022, 9:42pm UTC](https://meta.discourse.org/t/docker-subfolder-install-not-working-due-to-ember-cli-proxy-error/242217/7 "2022-10-18T21:42:49Z")

</div>

Solved.

My bad for not adding this to the Ember CLI container (it was already on the Rails container):

```plaintext
DISCOURSE_RELATIVE_URL_ROOT: "/board"

```

Ooops 😅

FYI the key file in source is I believe this:

> <https://github.com/discourse/discourse/blob/6c49ec39ea520195e00d31d57da33608af278d65/app/assets/javascripts/discourse/config/environment.js#L7>

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