Update Dockerfile

[djacobs7]

Dockerfile did not work out of the box. These were necessary changes to get editly running in Docker as far as I could tell. It's quite possible I was doing something wrong, but I thought it might save some you or someone else the trouble of having to debug this again

ERROR 1
First error is that you see this when you try to run editly:

ERROR Error [ERR_UNSUPPORTED_ESM_URL_SCHEME]: Only file and data URLs are supported by the default ESM loader. On Windows, absolute paths must be valid file:// URLs. Received protocol 'c:'

Fix:
Put in a minimum NODE_VERSION ( as documented here: https://stackoverflow.com/questions/69665780/error-err-unsupported-esm-url-scheme-only-file-and-data-urls-are-supported-by )

Error 2

internal/modules/cjs/loader.js:1250

return process.dlopen(module, path.toNamespacedPath(filename));

Fix:

• Add LD_LIBRARY_PATH for canvas support, as documented here: cannot run on docker running on osx m1 #141

[bkeepers]

@djacobs7 thanks for your pull request. I did a bigger rewrite of the Dockerfile in #312 to use the official node images, and to add a build stage so it doesn't depend on precompiled binaries for canvas/gl.

Woudl you be willing to give it a try and let me know if it works for you now?