chore(canary): expand project .gitignore for Go + Node + secrets

- Ignore docs/ (dev-only planning material)
- Ignore env files except .env.example
- Ignore backend Go build/test artifacts (bin, tmp, coverage)
- Ignore frontend Node + Vite caches and dist
- Ignore local data volumes (geoip mmdb, sqlite databases)
- Ignore OS/editor cruft and lint caches

PROJECTS/beginner/canary-token-generator/.gitignore

@@ -0,0 +1,79 @@
+# ©AngelaMos | 2026
+# .gitignore
+
+# ----------------------------------------------------------------------------
+# Dev-only documentation (never committed)
+# ----------------------------------------------------------------------------
+docs/
+
+# ----------------------------------------------------------------------------
+# Environment files (secrets)
+# ----------------------------------------------------------------------------
+.env
+.env.local
+.env.*.local
+!.env.example
+
+# ----------------------------------------------------------------------------
+# Backend (Go)
+# ----------------------------------------------------------------------------
+backend/bin/
+backend/tmp/
+backend/*.test
+backend/coverage.out
+backend/coverage.html
+backend/.golangci-cache/
+backend/data/
+backend/keys/
+
+# ----------------------------------------------------------------------------
+# Frontend (Node / Vite)
+# ----------------------------------------------------------------------------
+frontend/node_modules/
+frontend/dist/
+frontend/.vite/
+frontend/.vite-temp/
+frontend/.tmp/
+frontend/.biome_cache/
+frontend/.turbo/
+frontend/coverage/
+
+# ----------------------------------------------------------------------------
+# Local data volumes (when bind-mounted)
+# ----------------------------------------------------------------------------
+data/
+*.mmdb
+*.db
+*.sqlite
+*.sqlite3
+
+# ----------------------------------------------------------------------------
+# OS / Editor
+# ----------------------------------------------------------------------------
+.DS_Store
+Thumbs.db
+.idea/
+.vscode/
+*.swp
+*.swo
+*~
+
+# ----------------------------------------------------------------------------
+# Logs
+# ----------------------------------------------------------------------------
+*.log
+logs/
+
+# ----------------------------------------------------------------------------
+# Generic build artifacts
+# ----------------------------------------------------------------------------
+dist/
+build/
+bin/
+
+# ----------------------------------------------------------------------------
+# Linter / pre-commit caches
+# ----------------------------------------------------------------------------
+.cache/
+.pre-commit-cache/
+.ruff_cache/