refactor: change node_env to production in dockerfile

backend/Dockerfile

@@ -1,7 +1,7 @@
 # path: ./Dockerfile
 FROM node:alpine
 RUN apk update && apk add --no-cache  build-base gcc autoconf automake zlib-dev libpng-dev nasm bash vips-dev
-ARG NODE_ENV=development
+ARG NODE_ENV=production
 ENV NODE_ENV=${NODE_ENV}
 WORKDIR /opt/
 COPY ./package*.json ./