`run` command fails due to MIME mismatch
wasm4 version:
- 2.2.0, `main` branch at 9db63e0

Using `w4 run` results in a blank web page being open with two errors in the console:

- The resource from “http://localhost:4444/wasm4.css” was blocked due to MIME type (“text/html”) mismatch (X-Content-Type-Options: nosniff)
- The resource from “http://localhost:4444/wasm4.js” was blocked due to MIME type (“text/html”) mismatch (X-Content-Type-Options: nosniff). 

wasm4 at the 086dfa8 commit runs normally

Browser:
Firefox 96.0