launch.json

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Launch",
            "type": "go",
            "request": "launch",
            "mode": "debug",
            "remotePath": "",
            "port": 2345,
            "host": "127.0.0.1",
            "program": "${workspaceRoot}",
            "env": {
                "LOGXI": "*",
                "LOGXI_FORMAT": "happy"
            },
            "args": [],
            "showLog": true
        }
    ]
}

tasks.json

{
    // See https://go.microsoft.com/fwlink/?LinkId=733558
    // for the documentation about the tasks.json format
    "version": "0.1.0",
    "command": "go",
    "isShellCommand": true,
    "args": ["build", "-v"],
    "showOutput": "always",
    "options": {
        "env": {
            "GOOS": "linux",
            "GOARCH": "amd64"
        }
    }
}