ActionView::Template::Error with Docker

### Expected behavior

A local version of the notebook.ai website, running in development mode would be accessible via webbrowser using http://localhost:3000

### Actual behavior


### Steps to reproduce the behavior

Follow the instructions for the docker install in the readme. (screenshotted in case readme changes at a later date)


I've only verified this to be an issue on Windows 10, I have not yet tested it on any other operating systems. I have confirmed this to be an issue on two different Windows 10 systems.

The version of the project being used is the 3.1.0 release.

### Application trace in text form

```
app/views/main/index.html.erb:26:in `_app_views_main_index_html_erb__3690971147142007073_47068045561520'
```

Start with the Docker installation instructions in the README and reproduce the issue on Windows 10 using the 3.1.0 release. Then inspect app/views/main/index.html.erb at line 26 and the application trace. Done means the development instance loads successfully at http://localhost:3000 without the ActionView::Template::Error.

Written by the indexing model from the issue text.