Release Process

Update CHANGELOG.md with version, date, and summary.
Commit changes
```
git commit -am "Prepare version X.Y.Z"
```
Create annotated tag
```
git tag -a X.Y.Z -m 'Version X.Y.Z'
```
Push commit and tag
```
git push && git push --tags
```
CI will pick it up, build, and push to Docker Hub automatically.