Sample GitHub Actions workflow to build a .NET application, build a Docker image, upload to Azure Container Registry, and then publish the image into Azure Container App

publish.yml

name: Deploy to Azure Container Apps

on:
  workflow_dispatch:
  push:
    branches: [main]

env:
  AZURE_CONTAINER_REGISTRY: <NAME>
  CONTAINER_APP_NAME: <NAME>
  RESOURCE_GROUP: <NAME>

jobs:
  build-and-deploy:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v4

      - name: Set up .NET Core
        uses: actions/setup-dotnet@v4
        with:
          dotnet-version: "8.0.x"

      - name: Build
        run: dotnet build --configuration Release

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Log in to ACR
        uses: docker/login-action@v3
        with:
          registry: ${{ env.AZURE_CONTAINER_REGISTRY }}.azurecr.io
          username: ${{ secrets.AZURE_REGISTRY_USERNAME }}
          password: ${{ secrets.AZURE_REGISTRY_PASSWORD }}

      - name: Build and push container image to ACR
        uses: docker/build-push-action@v6
        with:
          push: true
          tags: ${{ env.AZURE_CONTAINER_REGISTRY }}.azurecr.io/${{ env.CONTAINER_APP_NAME }}:${{ github.sha }}
          file: Refit.Api/Dockerfile

      - name: Azure Login
        uses: azure/login@v2
        with:
          creds: ${{ secrets.AZURE_CREDENTIALS }}

      - name: Deploy to Azure Container Apps
        uses: azure/container-apps-deploy-action@v1
        with:
          imageToDeploy: ${{ env.AZURE_CONTAINER_REGISTRY }}.azurecr.io/${{ env.CONTAINER_APP_NAME }}:${{ github.sha }}
          resourceGroup: ${{ env.RESOURCE_GROUP }}
          containerAppName: ${{ env.CONTAINER_APP_NAME }}
          environmentVariables: |
            ASPNETCORE_ENVIRONMENT=Development