Add docker login to build-push.sh and watch-loop.sh for registry auth (HTTP secret)

products/build-push.sh

@@ -42,6 +42,9 @@ else
   TARGETS=("dd0c-drift" "dd0c-alert" "dd0c-portal" "dd0c-cost" "dd0c-run")
 fi
 
+# Login to registry
+echo "secret" | docker login "$REGISTRY" --username dd0c --password-stdin 2>/dev/null || true
+
 echo -e "${YELLOW}dd0c Build & Push — $(date -u '+%Y-%m-%d %H:%M UTC')${NC}"
 echo -e "Registry: ${REGISTRY}\n"