debug arch env not affecting release step base image

Author: PathToLife

Diff for: Dockerfile

@@ -29,7 +29,9 @@ RUN npm run build
 #########################################
 # We are using Github Actions: redhat-actions/buildah-build@v2 which seems to need manual specification of arch in build steps
 # Remove ARCH if docker buildx is supported in the CI release as --platform=$TARGETPLATFORM will be automatically set
-ARG ARCH
-FROM ${ARCH}/nginx:stable-alpine AS cyberchef
+ARG TARGETARCH
+FROM ${TARGETARCH}/nginx:stable-alpine AS cyberchef
+
+RUN echo "I'm building for $TARGETARCH"
 
 COPY --from=builder /app/build/prod /usr/share/nginx/html/