This is needed for support of WASM standard' https://www.w3.org/TR/wasm-web-api-1/#streaming-modules instantiateStreaming and compileStreaming,
and causes errors like
```
WASM: wasm streaming compile failed: TypeError: Failed to execute 'compile' on 'WebAssembly': Incorrect response MIME type. Expected 'application/wasm'.
```
since plain text is returned instead.
It also doesn't seem to be easily fixable even with `nginx.conf.sigil` substitution
You may completely override the built-in nginx config by placing an `app-nginx.conf.sigil` file in the root, modeled after our own [`conf/app-nginx.conf.sigil`](https://github.com/dokku/buildpack-nginx/blob/master/conf/app-nginx.conf.sigil). This will be used inside of the container, and not by the host Dokku instance. See the [sigil project](https://github.com/gliderlabs/sigil) for more information concerning the sigil format.
### Custom MIME types
Files will be served with a `Content-Type` according to a list of supported MIME types at [`conf/mime.types`](https://github.com/dokku/heroku-buildpack-nginx/blob/master/conf/mime.types). If you need to serve files of a MIME type not included in the list, you can provide your own `mime.types` file in the root.
## Credits and License
`buildpack-nginx` is licensed under the CC0 1.0 Universal license and has been informed by many similar projects on the web.