ASP.NET Core Web API targeting .NET 8 on Azure App Service

I have created a basic ASP .NET Core Web API with version .NET-8.0 and deployed to Azure App Service using GitHub actions.

Steps Followed:

• Created an ASP .NET Core Web API project with .NET 8 version and able to run locally.

• Modified program.cs:

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddControllers();

builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();

var app = builder.Build();

app.UseDeveloperExceptionPage();
app.UseSwagger();
app.UseSwaggerUI(x =>
{

    x.SwaggerEndpoint("/swagger/v1/swagger.json", "Web API V1");

#if DEBUG
    x.RoutePrefix = "swagger"; // For localhost
#else
    x.RoutePrefix = string.Empty; //  For azure
#endif
}
);
app.UseHttpsRedirection();

app.UseAuthorization();

app.MapControllers();

app.Run();

• Pushed the application to GitHub.
• Created a Windows Azure App Service with .NET-8.0(Early Access) as run time stack.

• Deploying the application to Azure using GitHub Actions.

My Workflow:

Below is the workflow I have used to deploy the application.

name: Build and deploy ASP.Net Core app to Azure Web App - <web_app_name>

on:
  push:
    branches:
      - main
  workflow_dispatch:

jobs:
  build:
    runs-on: windows-latest

    steps:
      - uses: actions/checkout@v4

      - name: Set up .NET Core
        uses: actions/setup-dotnet@v1
        with:
          dotnet-version: '8.x'
          include-prerelease: true

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

      - name: dotnet publish
        run: dotnet publish -c Release -o ${{env.DOTNET_ROOT}}/myapp

      - name: Upload artifact for deployment job
        uses: actions/upload-artifact@v3
        with:
          name: .net-app
          path: ${{env.DOTNET_ROOT}}/myapp

  deploy:
    runs-on: windows-latest
    needs: build
    environment:
      name: 'Production'
      url: ${{ steps.deploy-to-webapp.outputs.webapp-url }}
    
    steps:
      - name: Download artifact from build job
        uses: actions/download-artifact@v3
        with:
          name: .net-app
      
      - name: Deploy to Azure Web App
        id: deploy-to-webapp
        uses: azure/webapps-deploy@v2
        with:
          app-name: '<web_app_name>'
          slot-name: 'Production'
          package: .
          publish-profile: ${{ secrets.AZUREAPPSERVICE_PUBLISHPROFILE_FXXXXXXXXXX }}

Deployment Status:

Running the application successfully.

If the issue still persists while deploying the application, add --self-contained in dotnet’s publish command in the GitHub workflow.

      - name: dotnet publish
        run: dotnet publish -c Release -o ${{env.DOTNET_ROOT}}/myapp --self-contained true