play.benjamin-kraft.eu/public/server/tsconfig.json

{
    "compilerOptions": {
        "target": "es6",
        "module": "commonjs",
        "sourceMap": true,
        "alwaysStrict": true,
        "outDir": "./js",
        "removeComments": true
    },
    "include": [
        "./ts"
    ]
}