fix: nginx/Dockerfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-ALPINE316-LIBWEBP-5902237
- https://snyk.io/vuln/SNYK-ALPINE316-NGHTTP2-6043732
- https://snyk.io/vuln/SNYK-ALPINE316-NGINX-5969471
- https://snyk.io/vuln/SNYK-ALPINE316-CURL-3063711
- https://snyk.io/vuln/SNYK-ALPINE316-CURL-3320719

nginx/Dockerfile

@@ -1,4 +1,4 @@
-FROM nginx:1.22.0-alpine
+FROM nginx:1.26.2-alpine
 
 RUN rm /etc/nginx/conf.d/default.conf
 COPY nginx.conf /etc/nginx/conf.d