Support enabling --public-url option

[leandertolksdorf]

In our usecase, we need the file to be copied to the build statically, but we also need the option to prepend the --public-url from parcel to the script tag's src.

[elwin013]

Hi @leandertolksdorf! Can you describe this a bit more? From this brief description looks like it can be solved with staticOutPath - please see example in the examples/customOutInDistFolder - when specifying that option static files path will be prepend with that path (example puts them in a vendor directory).

An example project (something minimal, could be based on examples) with description of expected results will be the best way to achieve this describe the use case.