Create nuget.config

Author: SimonCropp

src/nuget.config

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <config>
+    <add key="signatureValidationMode" value="require" />
+  </config>
+  <packageSources>
+    <clear />
+    <add key="nuget.org" value="https://api.nuget.org/v3/index.json" protocolVersion="3" />
+  </packageSources>
+  <trustedSigners>
+    <repository name="nuget.org" serviceIndex="https://api.nuget.org/v3/index.json">
+      <!-- Current: expires May 15, 2024 -->
+      <certificate fingerprint="5A2901D6ADA3D18260B9C6DFE2133C95D74B9EEF6AE0E5DC334C8454D1477DF4"
+                   hashAlgorithm="SHA256"
+                   allowUntrustedRoot="false" />
+      <!-- Next -->
+      <certificate fingerprint="1F4B311D9ACC115C8DC8018B5A49E00FCE6DA8E2855F9F014CA6F34570BC482D"
+                   hashAlgorithm="SHA256"
+                   allowUntrustedRoot="false" />
+      <!-- For some very old MS packages -->
+      <certificate fingerprint="0E5F38F57DC1BCC806D8494F4F90FBCEDD988B46760709CBEEC6F4219AA6157D"
+                   hashAlgorithm="SHA256"
+                   allowUntrustedRoot="false" />
+    </repository>
+  </trustedSigners>
+</configuration>