diff --git a/Dockerfile b/Dockerfile
index abb90d3..d200dca 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,10 +4,11 @@ WORKDIR /app
 
 COPY package.json package-lock.json ./
 RUN npm install
+RUN npm run build
 
 COPY . .
 
-EXPOSE 3000
+EXPOSE 4321
 
 ENTRYPOINT ["npm", "run"]
-CMD ["dev"]
+CMD ["preview"]