Add deployment verification, examples, and test coverage

[Copilot]

Validates dockr can replace traditional Dockerfiles/docker-compose for typical web deployments.

Changes

Test Coverage

• Comprehensive test suite (test_deployment.py) covering Dockerfile generation, Compose orchestration, reverse proxy integration (Caddy/SWAG), and full-stack deployments
• All 6 test suites passing

Production-Ready Examples

Three complete deployment patterns in examples/:

Python Web App (python_webapp/)

• FastAPI/Flask + PostgreSQL + Caddy with auto-HTTPS
• Environment-based config (dev/prod)

Microservices (microservices/)

• API Gateway (Node.js) + services (Python) + PostgreSQL + Redis
• Network isolation (frontend/backend)

Static Sites (static_site/)

• nginx + multi-stage builds for SPAs
• Asset optimization + auto-HTTPS

Documentation

• DEPLOYMENT_VERIFICATION.md - Capability matrix and deployment patterns
• VERIFICATION_SUMMARY.md - Executive summary and quick start
• Per-example READMEs with deployment instructions

Example Usage

from dockr.core import Dockerfile
from dockr.compose import Compose
from dockr.caddy import caddy

# Define stack in Python, no YAML needed
dc = (Compose()
    .svc('app', build='.', depends_on=['db'])
    .svc('db', image='postgres:15', 
         env={'POSTGRES_PASSWORD': '${DB_PASSWORD}'},
         volumes={'pgdata': '/var/lib/postgresql/data'})
    .svc('caddy', **caddy(
        domain='example.com',
        app='app',
        port=8000,
        dns='cloudflare'  # Auto-HTTPS via DNS challenge
    ))
    .network('web')
    .volume('pgdata')
)

dc.up()  # Deploy entire stack

Verified Capabilities

• Dockerfile generation (all instructions, multi-stage builds)
• Compose orchestration (services, networks, volumes, dependencies)
• Reverse proxy with automatic HTTPS (Caddy/SWAG)
• Database/cache integration
• Network isolation
• Podman support via DOCKR_RUNTIME env var

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• https://api.github.com/repos/Karthik777/vedicreader
  • Triggering command: /usr/bin/curl curl -s REDACTED (http block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

---

💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.