feat: add app_name input to build.yml for single-app image name override

[bedatty]

Summary

Add an app_name input to the build.yml reusable workflow to allow callers to override the Docker image name in single-app mode. This enables repositories with multiple Docker images (different Dockerfiles) to call the shared workflow multiple times with different image names.

Problem

Currently, in single-app mode (no filter_paths), the image name is hardcoded to github.event.repository.name:

# build.yml - set-matrix step
APP_NAME="${{ github.event.repository.name }}"
echo "matrix=[{\"name\": \"${APP_NAME}\", \"working_dir\": \".\"}]" >> $GITHUB_OUTPUT

Repositories like plugin-br-pix-direct-jd need to build two separate Docker images from different Dockerfiles (docker-app.Dockerfile and docker-job.Dockerfile) with different image names (plugin-br-pix-direct-jd and plugin-br-pix-direct-jd-job).

Without an override, both calls produce the same image name, making it impossible to use the shared workflow for this pattern.

Proposed Solution

Add an app_name input:

app_name:
  description: 'Override app/image name (single-app mode only). Defaults to repository name.'
  type: string
  default: ''

Update the set-matrix step to use it:

- name: Set matrix
  id: set-matrix
  run: |
    if [ -z "${{ inputs.filter_paths }}" ]; then
      APP_NAME="${{ inputs.app_name || github.event.repository.name }}"
      echo "matrix=[{\"name\": \"${APP_NAME}\", \"working_dir\": \".\"}]" >> $GITHUB_OUTPUT
      echo "has_builds=true" >> $GITHUB_OUTPUT
    else
      # monorepo mode unchanged
    fi

Usage Example

jobs:
  build_pix:
    uses: LerianStudio/github-actions-shared-workflows/.github/workflows/build.yml@main
    with:
      app_name: 'plugin-br-pix-direct-jd'
      dockerfile_name: 'docker-app.Dockerfile'
      enable_ghcr: true
    secrets: inherit

  build_job:
    uses: LerianStudio/github-actions-shared-workflows/.github/workflows/build.yml@main
    with:
      app_name: 'plugin-br-pix-direct-jd-job'
      dockerfile_name: 'docker-job.Dockerfile'
      enable_ghcr: true
    secrets: inherit

Impact

• Non-breaking change (default behavior unchanged)
• Enables TypeScript/Node.js plugins with multiple Docker images to adopt the shared workflow
• Reduces workflow duplication across repositories

[bedatty]

Repositorie to use like an example: https://github.com/LerianStudio/plugin-br-pix-direct-jd/blob/develop/.github/workflows/build.yml