diff --git a/Dockerfile b/Dockerfile
index 998466b..261b380 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -103,17 +103,17 @@ ENV PATH /usr/src/app/node_modules/.bin:$PATH
 # install app dependencies
 COPY package.json ./
 #COPY package-lock.json ./
-# RUN yarn install --silent
+RUN npm install --silent
 # RUN npm install react-scripts@3.4.1 -g --silent
 
 # add app
 COPY . ./
-#c RUN yarn run build
+RUN npm run build
 
 # start app
 #CMD ["npm","run", "start"]
 
-# CMD ["yarn","run", "preview"]
+CMD ["npm","run", "preview"]