Initial release: Disc Agenda frisbee tournament platform

Full-stack tournament management app with real-time scoring:
- Go 1.26 backend with REST API and WebSocket live scoring
- React 19 + Vite 8 frontend with mobile-first design
- File-based JSON storage with JSONL audit logs
- Multi-stage Docker build with Gitea CI/CD pipeline
- Post-tournament questionnaire with spirit voting
- Technical documentation and project description

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,23 @@
+# Dependencies
+frontend/node_modules/
+frontend/dist/
+
+# Go
+backend/server
+
+# IDE
+.idea/
+.vscode/
+*.swp
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Leftover / duplicate
+frisbee-tournament/
+
+# Data (keep structure but ignore runtime data)
+data/tournaments/*/games/*_audit.jsonl
+data/tournaments/*/games/*_score.json
+data/tournaments/*/questionnaire_responses/*.json