Initial scaffold: full-stack RackMapper application

Complete project scaffold with working auth, REST API, Prisma/SQLite
schema, Docker config, and React frontend for both Rack Planner and
Service Mapper modules. Both server and client pass TypeScript strict
mode with zero errors. Initial migration applied.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.env.example

@@ -0,0 +1,17 @@
+# Copy this file to .env and fill in values before running locally
+# In Docker/Unraid, set these as container environment variables instead
+
+# Admin credentials
+ADMIN_USERNAME=admin
+ADMIN_PASSWORD_HASH=      # Generate with: npx ts-node scripts/hashPassword.ts yourpassword
+
+# JWT
+JWT_SECRET=               # Min 32 random chars — generate with: openssl rand -hex 32
+JWT_EXPIRY=8h
+
+# Database (relative path inside container; bind-mounted to ./data/)
+DATABASE_URL=file:./data/rackmapper.db
+
+# Server
+PORT=3001
+NODE_ENV=development