Add nuget.config to .gitignore root exceptions

Add nuget.config

.gitignore

@@ -414,6 +414,7 @@ FodyWeavers.xsd
 
 #ignore all in root folder except the allowed values
 /*
+!nuget.config
 !.editorconfig
 !.gitignore
 !LICENSE

nuget.config

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+    <config>
+        <add key="repositoryPath" value="%PACKAGEHOME%/External" />
+    </config>
+
+    <packageRestore>
+        <add key="enabled" value="True" />
+        <add key="automatic" value="True" />
+    </packageRestore>
+    <packageSources>
+        <add key="NuGet official package source" value="https://api.nuget.org/v3/index.json" />
+		<add key="Local repository" value="%LOCAL_NUGET%" />
+    </packageSources>
+
+    <disabledPackageSources />
+</configuration>