diff --git a/dockerfile-captain.edge b/dockerfile-captain.edge
index 85b8b51..15e45a5 100644
--- a/dockerfile-captain.edge
+++ b/dockerfile-captain.edge
@@ -15,7 +15,7 @@ RUN npm ci && \
      mv ./edge-override.json ./config-override.json
 
 
-# Build frontend code
+# Build frontend code.
 
  # This quick hack invalidates the cache.
 ADD https://www.google.com /time.now