Update CI

.github/workflows/main.yml

@@ -46,7 +46,12 @@ jobs:
           path: Reactor.Debugger/bin/Release/net6.0/Reactor.Debugger.dll
 
       - uses: softprops/action-gh-release@v1
-        if: startsWith(github.ref, 'refs/tags/')
+        if: github.ref_type == 'tag'
         with:
           draft: true
           files: Reactor/bin/Release/net6.0/Reactor.dll
+
+      - name: Push nightly NuGet package
+        if: github.repository == 'NuclearPowered/Reactor' && github.ref == 'refs/heads/master'
+        run: |
+          dotnet nuget push Reactor/bin/Release/Reactor.*.nupkg --source https://nuget.reactor.gg/v3/index.json --api-key ${{ secrets.REACTOR_NUGET_KEY }}