feat: Add Docker Compose setup for fullstack deployment

- Add Frontend Dockerfile with Next.js standalone build
- Add docker-compose.yml for production deployment
- Add docker-compose.dev.yml for development with hot-reload
- Configure Frontend next.config.js with standalone output
- Add .dockerignore files for both backend and frontend
- Add comprehensive README-DOCKER.md documentation
- Update .gitignore to exclude node_modules and build artifacts
- Remove obsolete component files (CycleCalculator.tsx, PHDiagram.tsx)
- Backend and Frontend communicate via Docker network
- Healthchecks configured for both services
- Environment variables configured for API URL

Frontend/public/sample_test_data.csv

@@ -0,0 +1,11 @@
+Pressure (bar),Enthalpy (kJ/kg)
+3.2,580
+3.5,595
+11.8,650
+12.1,652
+12.0,380
+11.9,375
+3.3,378
+8.5,500
+5.0,450
+7.2,520

Frontend/public/sample_test_data.json

@@ -0,0 +1,16 @@
+{
+  "description": "Sample test points for R290 refrigeration cycle",
+  "refrigerant": "R290",
+  "points": [
+    { "pressure": 3.2, "enthalpy": 580 },
+    { "pressure": 3.5, "enthalpy": 595 },
+    { "pressure": 11.8, "enthalpy": 650 },
+    { "pressure": 12.1, "enthalpy": 652 },
+    { "pressure": 12.0, "enthalpy": 380 },
+    { "pressure": 11.9, "enthalpy": 375 },
+    { "pressure": 3.3, "enthalpy": 378 },
+    { "pressure": 8.5, "enthalpy": 500 },
+    { "pressure": 5.0, "enthalpy": 450 },
+    { "pressure": 7.2, "enthalpy": 520 }
+  ]
+}