service worker on local host with virtual host ... doesn't work

I have enabled https on my local server
however the ssl certifcate is obviously self signed and chrome gives error

SW register fail DOMException: Failed to register a ServiceWorker: An SSL certificate error occurred when fetching the script.

and it throws net::ERR_INSECURE_RESPONSE while trying to fetch worker.js

Start by reproducing the ServiceWorker registration failure in Chrome on a local HTTPS virtual host, then inspect the worker.js fetch and the reported net::ERR_INSECURE_RESPONSE error. Confirm the certificate and browser conditions involved before determining what change or documentation is needed; done means the registration behavior is verified against the report.

Written by the indexing model from the issue text.