fix: 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-CURL-3320719
- https://snyk.io/vuln/SNYK-ALPINE316-CURL-5958908
- https://snyk.io/vuln/SNYK-ALPINE316-CURL-5958908

Dockerfile

@@ -11,7 +11,7 @@ COPY . ./
 RUN npm run build
 
 ##stage 2. build the production (server) environment
-FROM nginx:1.23.2-alpine
+FROM nginx:1.27.3-alpine
 
 #install curl and envsubst
 RUN apk --no-cache add curl