chore: repository hygiene — P2 cleanup
- .gitignore: add coverage/ and data/ patterns
- .dockerignore: exclude screenshots, tests, scripts, .github, docs
assets from build context for faster Docker builds
- Delete docs/social-preview.html (one-time generator, no longer needed)
- Delete public/locales/.gitkeep (directory has de.json and en.json)
- scripts/seed-demo.js: replace hardcoded absolute path with portable
resolve(__dirname, '..', 'data', 'oikos.db') default
- Add .github/PULL_REQUEST_TEMPLATE.md with summary, changes, checklist
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Ulas
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