pipeline - add semantic versioning

Author: tomaszprasolek

.github/workflows/dotnet.yml

@@ -1,7 +1,7 @@
 # This workflow will build a .NET project
 # For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-net
 
-name: .NET
+name: Build and push to DockerHub
 
 on:
   push:
@@ -25,6 +25,12 @@ jobs:
     - name: Test
       run: dotnet test --no-build --verbosity normal
 
+    - name: Determine next version
+      id: next-version
+      uses: flatherskevin/semver-action@v1
+      with:
+        type: patch
+
     - name: Login to Docker Hub
       uses: docker/login-action@v2
       with:
@@ -36,4 +42,6 @@ jobs:
       with:
         context: ./KubernetesTestApp/.
         push: true
-        tags: ${{ secrets.DOCKERHUB_USERNAME }}/kubernetestestapp:latest
+        tags: |
+          ${{ secrets.DOCKERHUB_USERNAME }}/kubernetestestapp:latest
+          ${{ secrets.DOCKERHUB_USERNAME }}/kubernetestestapp:${{ steps.next-version.outputs.next }}