Create Ironic Container file

[abhibongale]

Create an optimized Dockerfile that builds Ironic from local source code. This will be the foundation for fast rebuilds - it needs to be structured for maximum Docker layer caching efficiency.

The Dockerfile should support building Ironic from a local directory (e.g., ~/code/ironic) so developers can test their changes.

Goals

• Create multi-stage Dockerfile for Ironic
• Optimize for Docker layer caching
• Build from local source directory
• Include all Ironic dependencies
• Support both API and Conductor services

Tasks

• Create stackbox/templates/ironic/Dockerfile
• Stage 1: Base OS and system packages
• Stage 2: Python dependencies (cached layer)
• Stage 3: Ironic source code
• Install required system packages (libvirt, etc.)
• Install Python dependencies from requirements.txt
• Copy and install Ironic from local source
• Configure proper entry points
• Add health check support
• Test full build (measure time)
• Test incremental rebuild (measure time)
• Document build process

Acceptance Criteria

• Dockerfile builds successfully
• Can build from local Ironic source
• Full build completes in < 5 minutes
• Incremental rebuild (code only) < 2 minutes
• Image size is reasonable (< 2GB)
• Both ironic-api and ironic-conductor can run from same image
• Health checks work