```

chore: enhance .gitignore and remove obsolete documentation files

- Reorganize .gitignore with categorized sections for better maintainability
- Add comprehensive ignore patterns for Python, Node.js, databases, logs, and build artifacts
- Add project-specific ignore rules for coordinator, explorer, and deployment files
- Remove outdated documentation: BITCOIN-WALLET-SETUP.md, LOCAL_ASSETS_SUMMARY.md, README-CONTAINER-DEPLOYMENT.md, README-DOMAIN-DEPLOYMENT.md
```

infra/nginx/nginx_fonts.conf

@@ -0,0 +1,5 @@
+location /fonts-font-awesome/ {
+        alias /usr/share/fonts-font-awesome/;
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+    }