diff --git a/Containerfile b/Containerfile
index 06e85f9..af436c1 100644
--- a/Containerfile
+++ b/Containerfile
@@ -11,6 +11,8 @@ RUN npm ci
 
 COPY . .
 
+RUN echo "CONTAINER DEBUG: WEBMENTION_TOKEN length=${#WEBMENTION_TOKEN}"
+
 RUN npm run build