Fix GitHub Actions workflows and documentation after Dockerfile consolidation

[Copilot]

The Dockerfiles were moved to dockerfiles/ directory in commit 95d3a09, but the GitHub Actions workflows still referenced the old locations without specifying the file parameter, causing builds to fail.

Changes

• GitHub Actions workflows: Added file parameter to docker/build-push-action to explicitly specify Dockerfile paths:

  • build_docker_image.yml: dockerfiles/Dockerfile
  • build_docker_dependencies_image.yml: dockerfiles/Dockerfile.dependencies

• Documentation: Updated docs/README.md:

  • Removed references to obsolete microservices (config-service, ers-dbwriter, opmon-dbwriter)
  • Fixed docker build context path from /dockerfiles to ./dockerfiles

Example

- name: Build and push Docker images
  uses: docker/build-push-action@v3
  with:
    context: ${{ github.workspace }}/microservices/
    file: ${{ github.workspace }}/microservices/dockerfiles/Dockerfile  # Added
    push: true
    tags: ${{ steps.meta.outputs.tags }}

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