Add eslint and code format configuration

[danielkhan]

Added eslint and copied all config files for code style over from fastify to make contributing easier.

Checklist

• [x] run npm run test and npm run benchmark
• [ ] tests and/or benchmarks are included
• [ ] documentation is changed or added
• [x] commit message and code follows the Developer's Certification of Origin and the Code of conduct

[danielkhan]

If we install this packages, I think we should at least use it in command instead of IDE only.

I tried but looking closer, it seems as if the eslint command is only used to validate typescript while eslint by configuration extends standard. By running standard on npm test the same rules the IDE uses through eslint are applied.

[danielkhan]

@climba03003 are we good to go? Don't want to gloss over your objection.

[danielkhan]

So, I only use the command before merging but not rely on the auto linting feature of IDE. And that is the reason why I think if you add it, you need to use it. As it do nothing in my environment, just increase the installation time.

Understood. Technically it is used as most IDEs will look inside the current workspace when trying to find eslint. But the fact that it does now work on my machine, is of course not too meaningful. Yet sticking to the same ruleset as fastify makes sense in my opinion.

[danielkhan]

I would like to ask you for one more test on your PC: starting from master, could you add a simple .eslintrc like this:

I've done that, cleaned node_modules, reinstalled without these deps. Turns out that Standard itself has the dependencies already, so I omitted them in my package.json now.

$ npm ls eslint
point-of-view@4.15.3 /Users/dkhan/CodeKitchen/point-of-view
└─┬ standard@16.0.4
  ├─┬ eslint-config-standard-jsx@10.0.0
  │ └── eslint@7.18.0 deduped
  ├─┬ eslint-config-standard@16.0.3
  │ └── eslint@7.18.0 deduped
  ├─┬ eslint-plugin-import@2.24.2
  │ └── eslint@7.18.0 deduped
  ├─┬ eslint-plugin-node@11.1.0
  │ ├─┬ eslint-plugin-es@3.0.1
  │ │ └── eslint@7.18.0 deduped
  │ └── eslint@7.18.0 deduped
  ├─┬ eslint-plugin-promise@5.1.1
  │ └── eslint@7.18.0 deduped
  ├─┬ eslint-plugin-react@7.25.3
  │ └── eslint@7.18.0 deduped
  └── eslint@7.18.0

[mcollina]

I think I landed the other PR first :( Can you rebase this?

[danielkhan]

I think I landed the other PR first :( Can you rebase this?

I was able to merge this.

[climba03003]

I think I landed the other PR first :( Can you rebase this?

I was able to merge this.

Can you remove the eslint related plugin inside this PR. As they are added in another PR.

[danielkhan]

Can you remove the eslint related plugin inside this PR. As they are added in another PR.

Correct. Done.