First commit.

.gitignore

@@ -0,0 +1,48 @@
+# Dependencies
+node_modules/
+backend/node_modules/
+frontend/node_modules/
+.pnp
+.pnp.js
+
+# Build outputs
+frontend/dist/
+frontend/dist-ssr/
+backend/dist/
+*.local
+
+# Environment variables
+.env
+.env.local
+.env.*.local
+
+# Logs
+logs/
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea/
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Testing
+coverage/
+
+# Temporary files
+*.tmp
+*.temp
+.cache/