fix: use wget for Docker health check instead of node

Spawning a full Node process for health checks is slow on Alpine and
can exceed the 3s timeout, causing the container to be marked unhealthy.
Use wget (built into Alpine) instead, and increase start_period to 15s.

web/docker-compose.yml

@@ -10,10 +10,10 @@ services:
       - TURTLE_SERVER_URL=${TURTLE_SERVER_URL:-}
     restart: unless-stopped
     healthcheck:
-      test: ["CMD", "node", "-e", "require('http').get('http://localhost:3001/api/health',r=>{process.exit(r.statusCode===200?0:1)}).on('error',()=>process.exit(1))"]
+      test: ["CMD", "wget", "-qO-", "http://localhost:3001/api/health"]
       interval: 10s
-      timeout: 3s
-      start_period: 5s
+      timeout: 5s
+      start_period: 15s
       retries: 3
 
   client:

web/server/Dockerfile

@@ -26,8 +26,8 @@ RUN chmod +x /usr/local/bin/docker-entrypoint.sh
 
 EXPOSE 3001
 
-HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
-  CMD node -e "require('http').get('http://localhost:3001/api/health',r=>{process.exit(r.statusCode===200?0:1)}).on('error',()=>process.exit(1))"
+HEALTHCHECK --interval=10s --timeout=5s --start_period=15s --retries=3 \
+  CMD wget -qO- http://localhost:3001/api/health || exit 1
 
 ENTRYPOINT ["docker-entrypoint.sh"]
 CMD ["node", "server.js"]