How to run nginx as non-privileged user with Docker nginx is an open-source solution for web serving and reverse proxying your web application. You put it “in front” of your different services, and nginx can route the traffic to the correct url. That's useful for micro-services, for example. Per default, nginx runs as root user. Why? Only root processes can listen to ports below 1024. The default port for web applications is usually 80 or 443.

I'm currently working on a few micro-services with Docker. The architecture looks promising to me, and I like to play with Docker containers. Lately I've been watching a few videos about Node.js/GraphQL Microservices by Better Coding Academy. The tutorial series assumes a lot of knowledge (JavaScript, Express, GraphQL, Docker). I would have liked more detailed explanations. But the videos are still useful for showing the architecture of an Express/GraphQL setup with micro-services.

I'm still trying to improve my Docker builds. Here's an example for a multi-stage Docker build for React:

base imageFROMnode:12.13.1-alpine as compile-image# install global packagesENV NPM_CONFIG_PREFIX=/home/node/.npm-globalRUN npm install npm@latest -gRUN npm install pnpm react-scripts@3.3.0 -g# set working directory & give permissions to user nodeRUN mkdir -p /usr/src/app && chown node:node /usr/src/appWORKDIR/usr/src/app# switch to non-root user & install dependenciesUSERnodeCOPY package*.json /usr/src/app/COPY pnpm-lock.yaml /usr/src/app/pnpm-lock.yamlENV PATH /usr/src/app/node_modules/.bin:$PATHENV PATH=$PATH:/home/node/.npm-global/binRUN pnpm install# set environment to production, overwrite# with docker-composeARG NODE_ENV=production ENV NODE_ENV $NODE_ENV# create buildCOPY .

Today I've tried to update one of my Docker apps that uses React, Enzyme, and Jest. This lead me on a wild goose chase about react-test-renderer and best practices for Docker builds for Node.js. I'm still not sure where the problem is (Enzyme, maybe?). But I found three useful resources for Docker and Node.js: Docker and Node.js Best Practices Node + Docker Hello World, for Showing Good Defaults for Using Node.

I'm currently wrangling with Docker. I'm working through some Docker courses on Udemy and Sitepoint. Plus, I'm reading articles on how to improve my Docker files. I like playing with tools like Docker and docker-compose. But they add a lot of complexity to an application. Here are some useful links and resources about Docker: Advanced multi-stage build patterns by Tõnis Tiigi 9 Common Dockerfile Mistakes by Jorge Silva Production-ready Docker packaging Docker for Node.

A few days ago, I created a Docker build for Flask with PostgreSQL (both with Alpine Linux and with Debian Linux). Installing psypcopg-2 binary (required for Postgres) requires you to build the package from source. Now the Docker image grows in size, as it still contains the build artifacts. The solution? Multi-stage Docker builds. Let's say we have the following docker-compose.yml file. There are two services: a Flask API called users and a Postgres database called users-db.

How to build a Python app with PostgreSQL I'm currently setting up a Flask app with PostgreSQL and Docker. Like most examples you'll find on the internet, the course I'm following uses Alpine Linux as a base image. Alpine's selling point is the small image size. But Alpine uses a different C library, musl, instead of glibc. That's one of the reasons why the website Pythonspeed recommends Debian Buster as the base image for Python (as of 2019).