Chore: display docker tag in UI for ci test builds (#7083)

Dockerfile

@@ -13,6 +13,16 @@ WORKDIR /src/src-ui
 RUN set -eux \
   && npm update npm -g \
   && npm ci
+
+ARG PNGX_TAG_VERSION=
+# Add the tag to the environment file if its a tagged dev build
+RUN set -eux && \
+case "${PNGX_TAG_VERSION}" in \
+  dev|fix*|feature*) \
+    sed -i -E "s/version: '([0-9\.]+)'/version: '\1 #${PNGX_TAG_VERSION}'/g" /src/src-ui/src/environments/environment.prod.ts \
+    ;; \
+esac
+
 RUN set -eux \
   && ./node_modules/.bin/ng build --configuration production