Update CONTRIBUTING.md

CONTRIBUTING.md

@@ -1,4 +1,4 @@
-# Contributing to Voila
+# Contributing to voila
 
 ## Setting up a development environment
 
@@ -11,25 +11,48 @@ conda activate voila
 python -m pip install -e .
 ```
 
+## Run voila
+
+To start voila, run:
+
+```bash
+voila
+```
+
+or
+
+```bash
+python -m voila
+```
+
+This will open a new browser tab at [http://localhost:8866/](http://localhost:8866/).
+
 When making changes to the frontend side of voila, open a new terminal window and run:
 
 ```bash
 cd js/
 npm run watch
 ```
 
+Then reload the browser tab.
+
 ## Running the examples
 
 A few additional libraries can be installed to run the example notebooks:
 
 ```bash
-# to run the examples
-conda install -c conda-forge ipywidgets bqplot
+conda install -c conda-forge ipywidgets ipyvolume bqplot scipy
 ```
 
 The examples can then be served with:
 
 ```bash
 cd notebooks/
 voila
-```
+```
+
+## Editing templates
+
+The default templates are located in the following folder: [share/jupyter/voila/templates/default](./share/jupyter/voila/templates/default). They are automatically picked up when running voila in development mode.
+
+After editing the templates, reload the browser tab to see the changes.