Add navigation docker build workflow

[spomichter]

Summary

• build and push the navigation docker image to GHCR on changes in docker/navigation

Testing

• not run (workflow change only)

[greptile-apps]

Greptile Overview

Greptile Summary

Adds a new GitHub Actions workflow job to build and push the navigation Docker image to GHCR. The job follows the existing pattern used by other image builds in the workflow, using the reusable _docker-build-template.yml workflow. It triggers on changes to docker/navigation/** files and builds from the osrf/ros:humble-desktop-full base image.

• Added navigation output to the check-changes job to track changes in docker/navigation/**
• Created navigation job that builds and pushes to ghcr.io/dimensionalos/navigation:{branch-tag}
• Job configuration matches pattern used by other standalone builds (dev, python, ros)
• Uses osrf/ros:humble-desktop-full as base image, which aligns with the navigation Dockerfile

Confidence Score: 5/5

• This PR is safe to merge with minimal risk
• The changes follow the exact pattern established by other docker build jobs in the workflow (ros, python, dev). The path filter, output declaration, and job configuration are all consistent with existing implementations. No dependencies on other jobs means it won't disrupt existing workflows. The referenced dockerfile and directory exist in the repository.
• No files require special attention

Important Files Changed

Filename	Overview
.github/workflows/docker.yml	Added navigation docker build job with path filtering for docker/navigation/**

Flowchart

flowchart TD
    A[Push to main/dev or PR] --> B[check-changes job]
    B --> C{Changed files filter}
    C -->|docker/navigation/** changed| D[navigation output = true]
    C -->|docker/ros/** changed| E[ros output = true]
    C -->|docker/python/** changed| F[python output = true]
    C -->|docker/dev/** changed| G[dev output = true]
    
    D --> H[navigation job]
    H --> I[_docker-build-template.yml]
    I --> J[Build from osrf/ros:humble-desktop-full]
    J --> K[Push to ghcr.io/dimensionalos/navigation:branch-tag]
    
    E --> L[ros job]
    F --> M[python job]
    G --> N[dev job]
    
    style H fill:#90EE90
    style D fill:#90EE90
    style K fill:#90EE90

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