added prod docker files

frontend/Dockerfile_prod

@@ -0,0 +1,14 @@
+# build stage
+FROM node:latest as build-stage
+WORKDIR /app
+COPY frontend/package*.json ./
+RUN npm ci
+COPY frontend/ .
+RUN npm run build
+
+# production stage
+FROM nginx:stable as production-stage
+COPY --from=build-stage /app/dist /usr/share/nginx/html
+COPY frontend/nginx.conf /etc/nginx/conf.d/default.conf
+EXPOSE 8000
+CMD ["nginx", "-g", "daemon off;"]