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Improvements to learning-environments.md #765

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Improvements to learning-environments.md #765

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9 changes: 4 additions & 5 deletions tutorials/learning_environment.md
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Expand Up @@ -8,7 +8,7 @@ The instructor can pose questions that the students then answer by clicking on a

## Self-Hosting

The easiest way to use the 3Dmol.js active learning environment is through the hosted viewer at [https://3dmol.csb.pitt.edu]. However, it may be desirable to host your own instance for your class. A light-weight Flask webserver can quickly be brought up on a Ubuntu Linux machine with a few commands:
The easiest way to use the 3Dmol.js active learning environment is through the hosted viewer at [https://3dmol.csb.pitt.edu](https://3dmol.csb.pitt.edu). However, it may be desirable to host your own instance for your class. A light-weight Flask webserver can quickly be brought up on a Ubuntu Linux machine with a few commands:


```{@lang bash}
Expand Down Expand Up @@ -36,16 +36,15 @@ Note that files put in the `3dmol` directory can be referenced as relative paths
If you already have a webserver running, you can redirect the websocket requests used by 3Dmol.js to the server running on port 5000. For example, for apache the following is added to the configuration (see [here](https://stackoverflow.com/questions/36472920/apache-proxy-configuration-for-socket-io-project-not-in-root)</a>):


<pre>
<font color='black'>RewriteEngine On
```apache.conf
RewriteEngine On
RewriteCond %{REQUEST_URI} ^/socket.io [NC]
RewriteCond %{QUERY_STRING} transport=websocket [NC]
RewriteRule /(.*) ws://localhost:5000/$1 [P,L]

ProxyPass /socket.io http://localhost:5000/socket.io
ProxyPassReverse /socket.io http://localhost:5000/socket.io
<font>
</pre>
```

The [flask-SocketIO documentation](https://flask-socketio.readthedocs.io/en/latest/) provides more information for running in other setups such as gunicorn, uwsgi, and nginx.

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