Merge pull request #554 from xavierdecoster/patch-1

Update myget.md

Author: JakeGinnivan

docs/more-info/build-server-setup/myget.md

@@ -1,2 +1,15 @@
 # MyGet
-// TODO Feel free to jump in and contribute
+
+MyGet Build Services has built-in support for GitVersion and is encouraging you to leverage GitVersion + GitFlow to produce Semantically Versioned packages.
+
+* Create a [custom build script](http://docs.myget.org/docs/reference/custom-build-scripts): we advise to run a tool like GitVersion in a *pre-build* script, so that it can set additional environment variables for the actual build script. MyGet [by convention](http://docs.myget.org/docs/reference/build-services#Pre-_and_post-build_steps) automatically picks up any of the following file names as pre-build script: 
+  * `pre-build.(bat|cmd|ps1)`
+  * `pre-myget.(bat|cmd|ps1)`
+* Run `GitVersion /output buildserver`: this will cause MyGet Build Services to set the current `%PackageVersion%` value to the NuGet-compatible SemVer generated by GitVersion and apply this [MyGet Environment Variable](http://docs.myget.org/docs/reference/build-services#Available_Environment_Variables) wherever it is used during the build process.
+* Ensure the build script has been pushed to your source repository root. Done :)
+
+Note: If you require the `AssemblyInfo.cs` files in your project to be patched with the information from GitVersion, you will have to run it manually, for example using the command: 
+
+`call %GitVersion% /updateassemblyinfo true`.
+
+Also check [docs.myget.org](http://docs.myget.org/docs/reference/build-services#GitVersion_and_Semantic_Versioning) for the latest full info.