Add a github actions ci pipeline

.github/workflows/nugetserver-ci.yml

@@ -0,0 +1,50 @@
+name: NuGet.Server CI
+
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+  schedule:
+    - cron: '0 12 * * 1-5' # Weekdays at 8 AM Eastern (UTC 12:00)
+  workflow_dispatch:
+
+env:
+  BuildConfiguration: Release
+  SimplePackageVersion: '1.0.0'
+
+jobs:
+  build-and-test:
+    name: Build and Test
+    runs-on: windows-2022
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
+
+      - name: Build
+        shell: powershell
+        run: |
+          $buildNumber = "${{ github.run_number }}"
+          $branch = "${{ github.ref_name }}" -replace '[_/]', '-'
+          .\build.ps1 `
+            -Configuration $env:BuildConfiguration `
+            -BuildNumber $buildNumber `
+            -SimpleVersion $env:SimplePackageVersion `
+            -SemanticVersion "$env:SimplePackageVersion-$branch-$buildNumber" `
+            -Branch "${{ github.ref_name }}" `
+            -CommitSHA "${{ github.sha }}"
+
+      - name: Run tests
+        shell: powershell
+        run: |
+          .\test.ps1 `
+            -Configuration $env:BuildConfiguration `
+            -BuildNumber ${{ github.run_number }}
+
+      - name: Upload test results
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: test-results
+          path: Results.*.xml