WIP - fix: Updating docker & nginx configs for multicore

[jurevans]

Resolves #1598

See: #1598

For an example of how to get multicore working locally with a production build, one can use the following Python script to host the dist folder locally (copy into /dist after building, then run python server.py

from http.server import HTTPServer, SimpleHTTPRequestHandler


class CustomHandler(SimpleHTTPRequestHandler):
    def end_headers(self):
        # Add the cross-origin headers to every response
        self.send_header("Cross-Origin-Opener-Policy", "same-origin")
        self.send_header("Cross-Origin-Embedder-Policy", "require-corp")

        # Call the base class's end_headers method
        super().end_headers()


# Run the server
server_address = ("", 8000)
httpd = HTTPServer(server_address, CustomHandler)
print("Serving on http://localhost:8000")
httpd.serve_forever()