launch.json

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "type": "dockerfile",
            "request": "launch",
            "name": "Docker: Build Alpine",
            "dockerfile": "${workspaceFolder}/alpine/Dockerfile",
            "contextPath": "${workspaceFolder}/alpine",
            "args": ["-t", "docker-sqlcmd:alpine"]
        },
        {
            "type": "dockerfile",
            "request": "launch",
            "name": "Docker: Build Ubuntu",
            "dockerfile": "${workspaceFolder}/ubuntu/Dockerfile",
            "contextPath": "${workspaceFolder}/ubuntu",
            "args": ["-t", "docker-sqlcmd:ubuntu"]
        }
    ]
}