launch.json

{
    "version": "0.2.0",
    "configurations": [
        {
            "type": "chrome",
            "request": "launch",
            "name": "Launch Chrome against localhost",
            "url": "http://localhost:8080",
            "webRoot": "${workspaceFolder}/react-app",
            "timeout": 20000,
            "sourceMaps": true,
            "runtimeArgs": [
            //   "--remote-debugging-port=9222"
            ],
            "sourceMapPathOverrides": {
              // requires inline-source-map in webpack.config.js for devtool
              // "browser-path": "web-root path"
              // IMPORTANT AREA:
              // Check sources in web browser DeveloperTools and change /app/ptc to 
              // your path above /src directory
              "/app/*": "${webRoot}/*",
            },
        },
        {
            "name": "Docker: Attach to Go (Delve)",
            "type": "go",
            "request": "attach",
            "mode": "remote",
            "substitutePath": [
                {
                    "from": "${workspaceFolder}/go-fiber",
                    "to": "/app",
                },
            ],
            "port": 2345,
            "host": "127.0.0.1",
            "showLog": true,
            "apiVersion": 2,
            "trace": "verbose"
        },
    ]
}