App fails to run with production build: Incorrect response MIME type for wasm

[bnheise]

This application fails to run. Instead, we get the following error output in the browser console:

Uncaught (in promise) TypeError: Failed to execute 'compile' on 'WebAssembly': Incorrect response MIME type. Expected 'application/wasm'.

Steps to reproduce:

1. git clone https://github.com/yewstack/yew-wasm-pack-template.git
2. yarn install
3. yarn build
4. cd dist
5. serve

Open the app in the browser, open dev tools, view the error message.