Refactor: Complete codebase reorganization and modernization

- Split server.js routes into modular files (server/routes/)
  - departures.js: Departure data endpoints
  - sites.js: Site search and nearby sites
  - config.js: Configuration endpoints

- Reorganized file structure following Node.js best practices:
  - Moved sites-config.json to config/sites.json
  - Moved API_RESPONSE_DOCUMENTATION.md to docs/
  - Moved raspberry-pi-setup.sh to scripts/
  - Archived legacy files to archive/ directory

- Updated all code references to new file locations
- Added archive/ to .gitignore to exclude legacy files from repo
- Updated README.md with new structure and organization
- All functionality tested and working correctly

Version: 1.2.0

package.json

@@ -1,6 +1,6 @@
 {
   "name": "sl-transport-departures-display",
-  "version": "1.0.0",
+  "version": "1.2.0",
   "description": "A digital signage system for displaying transit departures, weather information, and news tickers",
   "main": "server.js",
   "scripts": {
@@ -16,7 +16,9 @@
   ],
   "author": "",
   "license": "MIT",
-  "dependencies": {},
+  "dependencies": {
+    "dotenv": "^16.3.1"
+  },
   "devDependencies": {
     "nodemon": "^2.0.22"
   },