chore: add reusable plugin workflow

[Fdawgs]

Created a basic reusable GitHub Action workflow that can be used across all of the plugins in the Fastify org.

Also integrates changes to coveralls actions as mentioned in fastify/fastify#3328, and the latest fastify/github-action-merge-dependabot version.

Checklist

• documentation is changed or added
• commit message and code follows the Developer's Certification of Origin
  and the Code of conduct

[mcollina]

lgtm

[climba03003]

Should we remove node@10 and wait until fastify@4 for the reusable workflow integration?

[Eomm]

We should add an example on how to use it with an external source, like mongodb

[Eomm]

Do we know if this is possible to do?

[Fdawgs]

Not 100% on what you mean @Eomm , sorry!

Do you mean using services like what is done in some of the Fastify repos such as fastify-postgres?

[Eomm]

Yes, exactly!

I don't understand if this is working reading the docs

[Fdawgs]

From reading the docs, I have no idea either!

I imagine it would look like the workflow below, but can't confirm it would work.
I can open a test PR on fastify-postgres to see if it would work with my fork?

name: CI
on:
  push:
    paths-ignore:
      - 'docs/**'
      - '*.md'
  pull_request:
    paths-ignore:
      - 'docs/**'
      - '*.md'
jobs:
  call-reuseable-workflow:
    runs-on: ubuntu-latest
    services:
       postgres:
        image: postgres:11-alpine
        env:
            POSTGRES_USER: postgres
            POSTGRES_DB: postgres
            POSTGRES_PASSWORD: postgres
        ports:
            - '5432:5432'
        options: >-
            --health-cmd pg_isready --health-interval 10s --health-timeout 5s
            --health-retries 5
    steps:
        - uses: fastify/workflows/.github/workflows/plugins-ci.yml@v1
          with:
            generate-coverage: true

Edit: Unable to get it to work with my attempts.
From the errors returned:

• Reusable workflows should be referenced at the top-level jobs.*.uses key, not within steps
• You cannot define both uses and steps at the same time in a job
• You cannot define both uses and services at the same time in a job

[Fdawgs]

Think we'd have to create variations of the workflow to support use of services.

[Eomm]

Would you mind using two-space tag instead of 4 spaces on the yml files?

[Eomm]

Do we know if this is possible to do?

[Fdawgs]

Would you mind using two-space tag instead of 4 spaces on the yml files?

The 4 space style is due to me using Prettier for a lot of my stuff.
Standard, which seems to be the main style in the Fastify org, doesn't seem to support yml formatting.

I don't know if we need to decide on a standard format for yml and other file types?

[Eomm]

Yes, standard is used to check js files.
I don't think that we need a yml files

I'm suggesting the 2 spaces because it fits better on mobile gh app when there is no pc at disposal, and to copy-cat the standard style as well

[Fdawgs]

Yes, standard is used to check js files. I don't think that we need a yml files

I'm suggesting the 2 spaces because it fits better on mobile gh app when there is no pc at disposal, and to copy-cat the standard style as well

Cool beans, will take a pass at it on Monday when back in work.

[climba03003]

LGTM.

[Fdawgs]

Yes, standard is used to check js files. I don't think that we need a yml files
I'm suggesting the 2 spaces because it fits better on mobile gh app when there is no pc at disposal, and to copy-cat the standard style as well

Cool beans, will take a pass at it on Monday when back in work.

Resolved by bc2a4f6

[Eomm]

LGTM

Just one note: before cutting a v1 release I would test how the services keyword works as some most used plugins need to set up this feature