Step 1 : Create/ open your NestJs Application in VS code, The official document link First steps | NestJS – A progressive Node.js framework In this blog, we are going to discuss How to integrate debug tools in visual studio code (vs Code). In the Development stage, every application has some bugs/errors so every developer should be finding bugs in their code and making the code error-free. In this case, you can add a firewall rule to allow communication between the VM where the container is running and the host where you have the VS Code session running.How to debug NestJs application on visual studio code On some machines, the firewall settings might prevent the debugging process from establishing a connection between the host and the container processes. You can also get around this behavior by setting the property inspectMode: 'break' in task.json file to prevent the app from running until the debugger attaches. In this case, refresh the browser to trigger the execution again to hit the breakpoint. Sometimes, the application might not break at the set breakpoint on the first run as the debugging process may not have started. From here, you can debug the application as if it's running on your host. You will see the sample application's landing page opening in your browser, and the code execution stopping at the breakpoint. Press F5 to start the application container in Debug mode. In the Debug window at the top, switch the active debug configuration to 'Docker Node.js Launch'.This step adds a Dockerfile and Launch Configuration required to debug the application. As it's a simple example, select No for the Include optional Docker Compose files prompt. Since this is an Express app, Select Node.js as the Application Platform and 3000 (or any other available port) as the port. Open the command palette (Ctrl+Shift+P, F1, or Cmd+Shift+P) and run 'Add Docker Files to Workspace'. Clone this repository and open expressapp folder in your VS Code session.

You can use the samples provided at this Github repository. Install the VS Code Docker extension from the marketplace.Install and launch Visual Studio Code or Visual Studio Code Insiders.Select dockerd (moby) as the Container Runtime from the Kubernetes Settings menu. Steps to debug a sample application running within a container The VS Code Docker extension makes it easy to build, manage, debug and deploy containerized applications in Visual Studio Code. Debugging a Container App with VS Code Docker extension

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