Add required CSP directives

[19Gerhard85]

Could you please provide the required CSP directives to make the map working with a strict CSP ruleset?

[jpett]

We also have the problem that the map won't load with a strict CSP in place. The problem seems to be that maplibre tries to create a worker with a blob WORKER_URL ("blob:http://localhost:4200/{randomly-generated-guid}"). Unfortunately we haven't found a way to change the WORKER_URL. There is a setWorkerUrl function exported by the @maptiler/sdk, but it seems that the worker is created before any of our initialisation code is executed. Any hints on how to make this work would be greatly appreciated, thank you.