Add NVM related docs.

Lombiq.Tests.UI/Docs/Linux.md

@@ -0,0 +1,12 @@
+# Linux-specific considerations
+
+
+
+## Global NPM vs Userspace NPM via Node Version Manager
+
+
+As Linux has a stricter access policy you may want to install NPM in the userspace so you can still install global packages (e.g. html-validate) without sudoing. The easiest way to do this is via NVM. If you don't have NVM yet, [follow the guide here](https://github.com/Lombiq/NPM-Targets/tree/dev#global-npm-vs-userspace-npm-via-node-version-manager-on-linux).
+
+As of writing this document, [Atata doesn't run bash as login shell](https://github.com/atata-framework/atata-cli/issues/1) so NVM wouldn't be loaded and the executables of globally installed packages' CLI executables won't be available. There are two workarounds for this:
+* Run your dev environment inside an NVM scope. For example: `nvm exec default rider`, `nvm exec default code`, etc.
+* Create a proxy command for each using the function from the NVM setup guide above, e.g.: `proxy-nvm-command html-validate`.

Readme.md

@@ -47,6 +47,7 @@ Do you want to quickly try out this project and see it in action? Check it out i
 - [Troubleshooting](Lombiq.Tests.UI/Docs/Troubleshooting.md)
 - [Limits](Lombiq.Tests.UI/Docs/Limits.md)
 - [Tools we use](Lombiq.Tests.UI/Docs/Tools.md)
+- [Linux-specific considerations](Lombiq.Tests.UI/Docs/Linux.md)
 
 
 ## Contributing and support