add Dockerfile

Dockerfile

@@ -0,0 +1,10 @@
+# FROM node:8.10-alpine
+FROM node:12
+WORKDIR /usr/src/app
+COPY package.json ./
+# RUN apt install git python3
+RUN npm install --only=production
+RUN npm i react@16.14.0
+RUN npm audit fix
+COPY . .
+CMD [ "npm", "start" ]