fix: drop Dockerfile healthcheck blocking Coolify deploys

The wget probe failed because nginx listens on IPv4 only while BusyBox
wget resolved localhost to ::1 first, returning Connection refused
despite a healthy nginx. A static SPA needs no liveness probe beyond
the container's running state; remove the HEALTHCHECK entirely.

Dockerfile

@@ -14,7 +14,4 @@ COPY --from=builder /app/dist /usr/share/nginx/html
 
 EXPOSE 80
 
-HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
-  CMD wget -qO- http://localhost/ > /dev/null || exit 1
-
 CMD ["nginx", "-g", "daemon off;"]