Add PR summary documentation

Co-authored-by: elasticdotventures <[email protected]>

Author: Copilot

.pr-summary.md

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+# PR Summary: Debian-based Docker and CI/CD Workflows
+
+This branch (`release/ghcr-debian-cross`) contains comprehensive updates to the Docker configuration and CI/CD workflows for the rust-cargo-docs-rag-mcp project.
+
+## Changes Made
+
+### 1. Dockerfile - Debian Migration
+- **Changed**: Migrated from Alpine to Debian slim (bullseye)
+- **Why**: Better compatibility with Rust dependencies and OpenSSL
+- **Details**: Multi-stage build preserved, uses `rust:1.91.1-slim-bullseye` for builder and `debian:bullseye-slim` for runtime
+
+### 2. docker/entrypoint.sh - Enhanced Wrapper
+- **Changed**: Improved entrypoint script with case statement
+- **Features**:
+  - Support for http and stdio modes
+  - Debug mode flag handling
+  - Pass-through support for custom arguments
+  - Better error messages for unknown modes
+
+### 3. .github/workflows/ci.yml - Build & Test Workflow
+- **New**: CI workflow for continuous integration
+- **Triggers**: On push to main and pull requests to main
+- **Steps**:
+  - Checkout code
+  - Cache cargo dependencies
+  - Install Rust 1.91.1 toolchain
+  - Build release binary
+  - Run all tests
+
+### 4. .github/workflows/release-and-publish.yml - Release Workflow
+- **New**: Comprehensive release automation
+- **Triggers**: On push of tags matching `v*` or manual dispatch
+- **Capabilities**:
+  - Multi-architecture Docker builds (amd64, arm64)
+  - Push to GitHub Container Registry (GHCR)
+  - Create GitHub releases
+  - Cross-compile binaries for x86_64 and aarch64 Linux
+  - Upload binaries as release assets
+
+### 5. scripts/set-version.sh - Portability Improvement
+- **Changed**: Rewritten from Python to pure shell
+- **Benefits**:
+  - No Python dependency required
+  - Falls back to sed if perl is not available
+  - More portable across different environments
+  - Idempotent and safe
+
+### 6. README.md - Comprehensive Documentation
+- **Changed**: Complete rewrite of README
+- **New sections**:
+  - Release/versioning workflow with Cocogitto
+  - Docker installation and usage (GHCR)
+  - Environment variables documentation
+  - pkgx and Cargo installation methods
+  - All available MCP tools with examples
+  - Testing tools directly without server
+  - MCP protocol integration examples
+
+## Validation Performed
+
+✅ YAML syntax validated for all workflows
+✅ Shell script syntax validated for entrypoint.sh and set-version.sh
+✅ Dockerfile validated with hadolint (minor warnings about best practices)
+✅ CodeQL security scan completed with no issues
+✅ Build system validated (cargo build succeeds)
+✅ Test suite runs (some pre-existing failures unrelated to these changes)
+
+## Files Modified
+
+```
+A  .github/workflows/ci.yml
+A  .github/workflows/release-and-publish.yml
+M  Dockerfile
+M  README.md
+M  docker/entrypoint.sh
+M  scripts/set-version.sh
+```
+
+## Next Steps
+
+1. Review and approve this PR
+2. Merge to main
+3. Tag a release (e.g., `v0.4.0`) to trigger the release workflow
+4. Verify Docker images are published to GHCR
+5. Verify binaries are attached to the GitHub release
+
+## Notes
+
+- The `production` environment referenced in the release workflow may need to be configured in GitHub repository settings
+- Ensure GitHub Actions has permission to publish packages (Settings → Actions → General → Workflow permissions → Read and write permissions)
+- The release workflow requires the `GITHUB_TOKEN` which is automatically provided by GitHub Actions