chore: add Coolify deployment scaffolding (Dockerfiles, prod compose, git hygiene)

- apps/api/Dockerfile: build NestJS, run prisma migrate deploy on start
- apps/web/Dockerfile + nginx.conf: build Vite, serve static, proxy /api -> api
- docker-compose.coolify.yml: full prod stack (postgres, redis, minio, keycloak, api, web)
- .dockerignore / .gitignore / .gitattributes

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,44 @@
+# Dependencies
+node_modules/
+.pnpm-store/
+
+# Build output
+dist/
+build/
+apps/web/dist/
+apps/api/dist/
+*.tsbuildinfo
+
+# Vite / caches
+.vite/
+**/.vite/
+.turbo/
+
+# Secrets — never commit. Keep only *.example
+.env
+.env.*
+!.env.example
+apps/api/.env
+apps/api/.env.*
+!apps/api/.env.example
+apps/web/.env
+apps/web/.env.*
+!apps/web/.env.example
+
+# Runtime data / uploads
+storage/
+apps/api/storage/
+*.sqlite
+*.db
+
+# Logs
+*.log
+npm-debug.log*
+pnpm-debug.log*
+
+# OS / editor
+.DS_Store
+Thumbs.db
+.idea/
+.vscode/*
+!.vscode/extensions.json