# How to add custom CSS code in the backend level and create new docker image

**URL:** <https://meta.discourse.org/t/how-to-add-custom-css-code-in-the-backend-level-and-create-new-docker-image/109535>\
**Category:** Product Support\
**Created:** [19 בפברואר,‏ 2019,‏ 10:50am UTC](https://meta.discourse.org/t/how-to-add-custom-css-code-in-the-backend-level-and-create-new-docker-image/109535 "2019-02-19T10:50:34Z")\
**Posts on this page:** 1\
**Showing post:** 10

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**Author:** ![Muthukkumar](https://avatars.discourse-cdn.com/v4/letter/m/77aa72/32.png) [@Muthukkumar](https://meta.discourse.org/u/Muthukkumar)\
**Post date:** [26 בפברואר,‏ 2019,‏ 6:37am UTC](https://meta.discourse.org/t/how-to-add-custom-css-code-in-the-backend-level-and-create-new-docker-image/109535/10 "2019-02-26T06:37:01Z")

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Thanks for the response. I have created own plugin, the plugin and setting.yml code is below.

plugin.rb

```
# name: my-theme
# about: CSS theme
# version: 0.1
# authors: Muthukkumar

register_asset 'stylesheets/common.scss'

```

setting.yml

```
plugins:
  awesomeness_enabled:
    default: true
    client: true
  awesomeness_max_volume:
    default: 10
    client: true

```

With this code the css file are working fine like I can able to see the different themes but when I click the plugin button I am getting the error “Error while trying to load”.  
console:

`[object Error]: {description: "Can't hydrate plugin without an `id`", message: "Can't hydrate plugin without an `id`", stack: "Error: Can't hydrate plugin without an `id` at _hydrate (http://mydomain.cloudapp.azure.com/assets/application-191c740da68414e64ef64eca7583598eb54021aa742309160a164d8f601e141f.js:9:541) at Anonymous function (http://mydomain.cloudapp.azure.com/assets/application-191c740da68414e64ef64eca7583598eb54021aa742309160a164d8f601e141f.js:8:31086) at Array.prototype.map (native code) at _resultSet (http://mydomain.cloudapp.azure.com/assets/application-191c740da68414e64ef64eca7583598eb54021aa742309160a164d8f601e141f.js:8:31063)`

And the logo also not getting changed. Could you please help me on that I have tried to find the solution but no luck.

Many thanks in advance.

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