add buil docker file-fix

.circleci/config.yml

@@ -85,7 +85,7 @@ jobs:
       - run: |
           TAG=latest
           docker build -t ahlemfahem1/projectci:$TAG .
-          echo $DOCKER_PASS | docker login -u $DOCKER_USER --password-stdin
+          echo $DOCKER_PASS | docker login -u $DOCKERHUB_USERNAME -p $DOCKERHUB_PASSWORD
           docker push ahlemfahem1/projectci:$TAG                   
 workflows:
   build:

Dockerfile

@@ -1,13 +1,12 @@
-FROM node
-WORKDIR /usr/app
+FROM node:12
+WORKDIR /usr/src/app
 
 COPY package.json yarn.lock ./
 
 COPY . .
 
-EXPOSE 4000
+EXPOSE 3000
 
 RUN yarn global add node-gyp && yarn install
 
 CMD ["yarn","start"]
-USER node