(chore) Upgrade nginx from 1.25 to 1.28 in frontend and gateway (#999)

Author: denniskigen

frontend/Dockerfile

@@ -20,7 +20,7 @@ RUN if [ ! -f ./spa/index.html ]; then echo 'Build failed. Please check the logs
 #--------------------------------------------
 # Runtime Stage - Published Image
 #--------------------------------------------
-FROM nginx:1.25-alpine
+FROM nginx:1.28-alpine
 
 RUN apk update && \
     apk upgrade && \

gateway/Dockerfile

@@ -1,5 +1,5 @@
 # syntax=docker/dockerfile:1.3
-FROM nginx:1.25-alpine
+FROM nginx:1.28-alpine
 
 ENV FRAME_ANCESTORS ""