chore: expand .gitignore and add Discord link to Community section

Author: membphis

.gitignore

@@ -1,2 +1,41 @@
 /target
 /default.etcd
+
+# Rust
+**/*.rs.bk
+.rustc_info.json
+
+# Node.js/TypeScript/Vite
+node_modules/
+ui/node_modules/
+ui/dist/
+ui/.vite/
+ui/.cache/
+*.tsbuildinfo
+tests/e2e/node_modules/
+
+# Editors
+.vscode/launch.json
+.idea/
+*.swp
+*.swo
+*~
+.DS_Store
+Thumbs.db
+
+# Logs
+*.log
+*.log.*
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+
+# Environment variables
+.env
+.env.local
+.env.*.local
+
+# Database files
+*.sqlite
+*.db

README.md

@@ -133,6 +133,7 @@ See [CONTRIBUTING.md](CONTRIBUTING.md) for the full contribution guide including
 ## Community
 
 - Contribute via [CONTRIBUTING.md](CONTRIBUTING.md) — setup, code style, and PR guidelines
+- Join our [Discord server](https://discord.gg/mAZzcRtP) for real-time chat with the community and maintainers
 - Use [GitHub Discussions](https://github.com/api7/aisix/discussions) for questions, ideas, and architecture discussions
 - Use [GitHub Issues](https://github.com/api7/aisix/issues) for bug reports, feature requests, and actionable tasks
 - Follow repository activity for ongoing documentation and product updates