diff --git a/apps/OpenSign/Dockerfile b/apps/OpenSign/Dockerfile
index 49067d236..4b07ff8cc 100644
--- a/apps/OpenSign/Dockerfile
+++ b/apps/OpenSign/Dockerfile
@@ -14,6 +14,8 @@ RUN npm install
 COPY apps/OpenSign/ .
 COPY apps/OpenSign/.husky .
 
+RUN npm run build
+
 # Make port 3000 available to the world outside this container
 EXPOSE 3000