fix(docker): remove curl to eliminate unfixable CVE-2026-3805

curl is not needed by nginx to serve static files. Removing it drops
the HIGH CVE from the image attack surface while Alpine upstream works
on a patch. Also clears apk cache to reduce image size.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: seab4ng

Dockerfile

@@ -11,7 +11,8 @@ LABEL maintainer="Yakir Veneci" \
       org.opencontainers.image.source="https://github.com/seab4ng/helm-values-veiwer"
 
 RUN apk upgrade --no-cache && \
-    rm -rf /usr/share/nginx/html/* /etc/nginx/conf.d/default.conf
+    apk del curl && \
+    rm -rf /usr/share/nginx/html/* /etc/nginx/conf.d/default.conf /var/cache/apk/*
 
 COPY nginx.conf           /etc/nginx/conf.d/default.conf
 COPY app/index.html       /usr/share/nginx/html/index.html