try to fix docker build

app/client/Dockerfile

@@ -2,10 +2,8 @@
 FROM node:12.16.3 as build
 
 RUN mkdir /usr/src/app
-RUN ls
 WORKDIR /usr/src/app
-RUN ls
-COPY package*.json ./
+COPY . .
 ENV PATH /usr/src/app/node_modules/.bin:$PATH
 
 RUN npm install --silent