Create push to nuget.yml

.github/workflows/push to nuget.yml

@@ -0,0 +1,57 @@
+name: Build and Publish to NuGet
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Set up .NET
+        uses: actions/setup-dotnet@v2
+        with:
+          dotnet-version: '5.0.x'
+
+      - name: Restore dependencies
+        run: dotnet restore SageTools/SageTools.csproj
+
+      - name: Build project
+        run: dotnet build SageTools/SageTools.csproj --configuration Release --no-restore
+
+      - name: Run tests
+        run: dotnet test SageTools/SageTools.csproj --no-build --verbosity normal
+
+  publish:
+    needs: build
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push' && github.ref == 'refs/heads/master'
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Set up .NET
+        uses: actions/setup-dotnet@v2
+        with:
+          dotnet-version: '5.0.x'
+
+      - name: Restore dependencies
+        run: dotnet restore SageTools/SageTools.csproj
+
+      - name: Build project
+        run: dotnet build SageTools/SageTools.csproj --configuration Release --no-restore
+
+      - name: Pack project
+        run: dotnet pack SageTools/SageTools.csproj --configuration Release --no-build --output ./output
+
+      - name: Publish to NuGet
+        run: dotnet nuget push ./output/*.nupkg --api-key ${{ secrets.NUGET_API_KEY }} --source https://api.nuget.org/v3/index.json