Merge pull request #376 from seamuslee001/apache_rewrite

Add in help message about troubleshooting where you cannot login to b…

docs/tools/buildkit.md

@@ -165,6 +165,7 @@ Buildkit provides a tool called `amp` which [civibuild](/tools/civibuild.md) use
 
 ## Troubleshooting {:#troubleshooting}
 
+### Node JS issues
 Nodejs version too old or npm update does not work:
 
 : Download the latest version from nodejs.org and follow their instructions
@@ -178,6 +179,16 @@ Nodejs problems
     npm install fs-extra
     ```
 
+### Website login issues
+
+If you find that when you try and login to a new buildkit build or similar and it doesn't seem to login just redirects to the same page. This may mean that the rewrite module for apache is not enabled. To enable it do the following
+
+```bash
+sudo a2enmod rewrite
+```
+
+After enabling the rewite module you will need to restart apache.
+
 ## Upgrading buildkit {:#upgrading}
 
 New versions of buildkit are likely to include new versions of tools. The new tools will download automatically when you first run `civibuild`. If you prefer to download explicitly, then re-run `civi-download-tools`.