Feature: Run from Wasmer CLI

[bitmage]

Hey Russ,

What would it take to get this running via Wasmer? Right now I get:

$ wasmer run main.wasm 
error: failed to run `main.wasm`
│   1: module instantiation failed (compiler: cranelift)
╰─▶ 2: WebAssembly translation error: Error when converting wat: input bytes aren't valid utf-8

I'd love to be able to provide the URL and image as command line arguments. I think your project would get a lot of use if people could access it like this from the CLI, or as a WASM module they include in other projects.