Add CI workflow to build, publish and test .NET app with artifact

.gitea/workflows/ci.yml

@@ -1,16 +1,31 @@
 name: First CI
 on: [push]
+
 jobs:
   build:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - name: build using gcc
+      - uses: actions/setup-dotnet@v3
-        run: |
-          gcc -Wall -Werror main.c -o program
-          ls -l program || true
-      - name: Archive production artifacts
-        uses: actions/upload-artifact@v3
         with:
-          name: program
+          dotnet-version: '8.0.x'
-          path: program
+      - run: dotnet restore
+      - run: dotnet build
+      - run: dotnet test
+      - run: dotnet publish -o app -r linux-x64 /p:PublishSingleFile=true,AssemblyName=app
+      - run: tar cf app.tar app/
+      - uses: actions/upload-artifact@v3
+        with:
+          name: app.tar
+          path: app.tar
+
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/download-artifact@v3
+        with:
+          name: app.tar
+
+      - run: tar xf app.tar
+
+      - run: ./app/app