(ui): removed hardcoded dockerfile image versions

react-ui/docker/webserver/Dockerfile

-FROM node:alpine3.20 as builder
+FROM ${GITLAB_PROXY}node:$GOLANG_VERSION-alpine as builder
 
-COPY  ./api/openapiv2/gosdn_northbound.swagger.json /app/api/openapiv2/gosdn_northbound.swagger.json
+COPY ./api/openapiv2/gosdn_northbound.swagger.json /app/api/openapiv2/gosdn_northbound.swagger.json
 COPY ./react-ui /app/react-ui
 
 RUN cd /app/react-ui && yarn && yarn build
 
-
 # webserver
-FROM nginx:alpine3.20
+FROM ${GITLAB_PROXY}nginx:$GOLANG_VERSION-alpine
 COPY --from=builder /app/react-ui/dist /usr/share/nginx/html
-COPY --from=builder /app/react-ui/docker/webserver/nginx.conf /etc/nginx/nginx.conf 
-EXPOSE 80
+COPY --from=builder /app/react-ui/docker/webserver/nginx.conf /etc/nginx/nginx.conf
+EXPOSE 80
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