fix: Dockerfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-ALPINE317-LIBWEBP-5902239
- https://snyk.io/vuln/SNYK-ALPINE317-NGHTTP2-5954769
- https://snyk.io/vuln/SNYK-ALPINE317-CURL-3320725
- https://snyk.io/vuln/SNYK-ALPINE317-CURL-3320725
- https://snyk.io/vuln/SNYK-ALPINE317-CURL-5958910

Dockerfile

@@ -14,7 +14,7 @@ WORKDIR /opt/blog-search/blog
 RUN hugo
 
 # Serve the site
-FROM nginx:1.23.3-alpine AS server
+FROM nginx:1.26.2-alpine AS server
 COPY --from=builder /opt/blog-search/blog/public/  /var/www/html/public/
 EXPOSE 6443/tcp
 CMD ["/usr/sbin/nginx", "-g", "daemon off;"]