Revert "Update README.md with installation instructions and Docker usage; add docker-compose.yml for service orchestration"

This reverts commit c8c2a800bb.

docker-compose.yml

@@ -1,27 +0,0 @@
-version: '3.8'
-
-services:
-  timetracker:
-    build:
-      context: .
-      dockerfile: Dockerfile
-    container_name: timetracker-app
-    ports:
-      - "3000:3000"
-    volumes:
-      # Persistent volume for SQLite database
-      - timetracker-data:/app/db
-    environment:
-      - NODE_ENV=production
-      - PORT=3000
-    restart: unless-stopped
-    healthcheck:
-      test: ["CMD", "node", "-e", "require('http').get('http://localhost:3000/', (r) => {process.exit(r.statusCode === 200 ? 0 : 1)})"]
-      interval: 30s
-      timeout: 3s
-      retries: 3
-      start_period: 5s
-
-volumes:
-  timetracker-data:
-    driver: local