fix: tools/docker/Dockerfile.apps to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-ALPINE314-CURL-2938017
- https://snyk.io/vuln/SNYK-ALPINE314-CURL-2938017
- https://snyk.io/vuln/SNYK-ALPINE314-CURL-3320728
- https://snyk.io/vuln/SNYK-ALPINE314-CURL-3320728
- https://snyk.io/vuln/SNYK-ALPINE314-CURL-5422126

tools/docker/Dockerfile.apps

@@ -1,7 +1,7 @@
 # This dockerfile should work for all traditional apps,
 # i.e. it only sets up a nginx server with the app dist folder
 
-FROM nginx:1.21.4-alpine
+FROM nginx:1.24-alpine
 
 ARG APP_NAME="search"
 ENV APP_NAME=${APP_NAME}