Fix health check to use IPv4 address

- Change health check from localhost to 127.0.0.1
- Fixes connection refused error (localhost resolves to IPv6)
- Both Dockerfile and docker-compose.yml updated

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Dockerfile

@@ -31,7 +31,7 @@ EXPOSE 80
 
 # Health check
 HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
-  CMD wget --quiet --tries=1 --spider http://localhost/ || exit 1
+  CMD wget --quiet --tries=1 --spider http://127.0.0.1/ || exit 1
 
 # Start nginx
 CMD ["nginx", "-g", "daemon off;"]

docker-compose.yml

@@ -11,7 +11,7 @@ services:
       - "8880:80"
     restart: unless-stopped
     healthcheck:
-      test: ["CMD", "wget", "--quiet", "--tries=1", "--spider", "http://localhost/"]
+      test: ["CMD", "wget", "--quiet", "--tries=1", "--spider", "http://127.0.0.1/"]
       interval: 30s
       timeout: 3s
       retries: 3