added azure pipeline + helmfiles

Dockerfile

@@ -0,0 +1,13 @@
+#stage 1
+FROM node:10-stretch as node
+ARG IS_PRODUCTION=false
+WORKDIR /app
+COPY . .
+RUN umask 0022
+RUN npm install --always-auth=false
+RUN if [ "${IS_PRODUCTION}" = "true" ] ; then npm run-script build-prod ; else npm run-script build ; fi
+
+# stage 2
+FROM nginx:alpine
+COPY --from=node /app/dist/sales /usr/share/nginx/html
+COPY --from=node /app/nginx.conf /etc/nginx/conf.d/default.conf