{
    "compilerOptions": {
        "module": "commonjs",
        "target": "es6",
        "sourceMap": true,
        "experimentalDecorators": true,
        "emitDecoratorMetadata": true,
        "noEmitHelpers": true,
        "noEmitOnError": true,
        "lib": ["es2015"],
        "outDir": "build"
    },
    "compileOnSave": true,
    "exclude": [
        "node_modules"
    ]
}

{
    "compilerOptions": {
        "module": "commonjs",
        "target": "es6",
        "sourceMap": true,
        "experimentalDecorators": true,
        "emitDecoratorMetadata": true,
        "noEmitHelpers": true,
        "noEmitOnError": true,
        "lib": ["es2015"],
        "outDir": "build"
    },
    "compileOnSave": true,
    "include": [
        "src/**/*.ts"
    ],
    "exclude": [
        "node_modules",
        "src/**/*.test.ts"
    ]
}

Configure tsc to look for files under the src/ dir
Configure tsc to look for files under the src/ dir

Since we aren’t giving the build script a path tsc will look for this setting in tsconfig
