Change command for running examples in README

[pbrinkmeier]

Addresses #390

This works in a fresh haskell:9.6.4-lite Docker container and will download necessary dependencies. It should continue to work for the foreseeable future. There's some minor formatting changes too, let me know if they're okay with you.

[ocramz]

Could you keep the stack example?

[pbrinkmeier]

This command does not work when I test it in a recent fresh haskell Docker container. stack run [...] does, but only if a stack.yaml is present. If we keep this I'd suggest adding a stack.yaml file too so that it works out of the box, thoughts (see #390)?

[ocramz]

No, adding a stack.yaml is not a good practice because it forces a fixed resolver on the users.

Indeed, I agree that the current stack example is not self-contained because it assumes a stack init && stack build.

[pbrinkmeier]

stack run -- scotty-basic works without stack build before but still requires a stack.yaml. I can try whether stack init && stack run ... works though. I guess for their own projects people can use whichever tool they want anyways.

[pbrinkmeier]

Hey, what's your opinion here? Should we add a stack.yaml to make it possible to do stack run or maybe add a hint for Stack users that it won't work out of the box even though it's compatible?