refactor: fix sonar complaints about dockerfile

Sonar was complaining that the multiple RUN commands should be combined. Good point!

Dockerfile

@@ -3,15 +3,20 @@ FROM docker.io/node:20.18.2-alpine3.21
 ENV NO_UPDATE_NOTIFIER=true
 WORKDIR /opt/app-root/src/app
 COPY . /opt/app-root/src
+
+# Run the npm tasks to set up the various parts of the application. Then create
+# the /.npm directory and grant access to group 0 to allow npm v9 to work
+# See: https://docs.openshift.com/container-platform/4.11/openshift_images/create-images.html#use-uid_create-images
+
 RUN npm run all:ci \
   && npm run all:build \
   && npm run frontend:purge \
   && npm run components:clean \
-  && npm run components:purge
+  && npm run components:purge \
+  && mkdir /.npm \
+  && chgrp -R 0 /.npm \
+  && chmod -R g=u /.npm
+
 EXPOSE 8000
-# Create the /.npm directory and grant access to group 0 to allow npm v9 to work
-# See: https://docs.openshift.com/container-platform/4.11/openshift_images/create-images.html#use-uid_create-images
-RUN mkdir /.npm
-RUN chgrp -R 0 /.npm && \
-    chmod -R g=u /.npm
+
 CMD ["npm", "run", "start"]