staging dockerfile setup

frontend/staging.Dockerfile

@@ -0,0 +1,21 @@
+FROM tiangolo/node-frontend:10 as builder
+
+ADD ./src /app/src
+COPY package*.json /app/
+COPY ./public /app/public
+WORKDIR /app
+
+ENV NODE_ENV=staging
+
+RUN npm install
+RUN npm run build
+
+FROM nginx:1.15
+
+COPY --from=builder /app/build/ /usr/share/nginx/html
+# COPY --from=builder /nginx.conf /etc/nginx/conf.d/default.conf
+# WORKDIR /usr/share/nginx/html/
+
+EXPOSE 80
+
+ENTRYPOINT ["nginx", "-g", "daemon off;"];