Support root as destination for compiled imba code (was "Fix bundling")

[ericvida]

Bundled project doesn't work out of the box.

[eulores]

Do not map directories containing Imba source files to the root. There's something strange on the snowpack side, still trying to figure out what's wrong. But for the time being, make this change in snowpack.config.json:

    "mount": {
        "src": "/",
        "public": "/"
    },

to

    "mount": {
        "src": "/scripts",
        "public": "/"
    },