cleans up landing page (#541)

docs/faq.md

@@ -48,6 +48,26 @@ We use a [Welch's _t_-test](https://en.wikipedia.org/wiki/Welch%27s_t-test) impl
 
 # Problems, errors, & bugs
 
+#### How do I create a Python 3.6 environment for _cellxgene_?
+
+If you use conda and want to create a [conda environment](https://conda.io/docs/user-guide/tasks/manage-environments.html) for _cellxgene_ you can use the following commands
+
+```
+conda create --yes -n cellxgene python=3.6
+conda activate cellxgene
+pip install cellxgene
+```
+
+Or you can create a virtual environment by using
+
+```
+ENV_NAME=cellxgene
+python3.6 -m venv ${ENV_NAME}
+source ${ENV_NAME}/bin/activate
+pip install cellxgene
+```
+
+
 #### In my _prepare_ command I received the following error `Warning: louvain module is not installed, no clusters will be calculated. To fix this please install cellxgene with the optional feature louvain enabled`
 
 Louvain clustering requires additional dependencies, so we don't include them by default. For now, you need to specify that you want these packages by using