Node.js, Python & Docker articles

Node.js, Python & Docker 210 Getting a Django application running Django is not in the cPanel apps installer, and nothing is missing: that installer is for PHP applications. Django...
Node.js, Python & Docker 197 Getting a Ruby on Rails application running Ruby on Rails is not in the cPanel apps installer, because that installer is for PHP applications. Ruby has a tool...
Node.js, Python & Docker 184 Installing Tomcat on a server of your own There is no Java and no Tomcat on our shared hosting servers, and they cannot be installed there. A Java application...
Node.js, Python & Docker 171 Configuring Tomcat: ports, memory and the site in front of it Still a VPS or dedicated server subject, with administrator access. There is no Java and no Tomcat on our shared...
Node.js, Python & Docker 392 Getting a Node.js application running Yes, there is Node.js on this hosting. It is not an extra you ask for, and it is not a VPS thing: it is in your...
Node.js, Python & Docker 156 Installing Docker and Docker Compose on a VPS Docker goes on a VPS with root access over SSH, never on shared hosting: there is no way to run it there. We...
Node.js, Python & Docker 136 Your first container, and what to look at when it will not start A container is a program running in a space of its own, with everything it needs already packed in an image. It...
Node.js, Python & Docker 128 Docker Compose: an application with its database Docker Compose describes a whole application in a single file: the program, the database, the networks between them...
Node.js, Python & Docker 140 Nginx as a reverse proxy in front of a container A reverse proxy is nginx receiving requests on ports 80 and 443, under your domain, and handing them to the...
Node.js, Python & Docker 140 HTTPS for a container: a certificate and a domain For an application running in a container to show the padlock, you need a domain pointing at the VPS and a...
Node.js, Python & Docker 132 Updating a Docker application without losing data Updating an application in Docker is, as a rule, pulling the new image and recreating the container. The data...
Node.js, Python & Docker 136 Docker filling the disk: images, volumes and logs Docker fills a VPS disk in three ways: the images and layers left behind after updates, the volumes nobody uses, and...
Node.js, Python & Docker 154 Node.js in cPanel: choosing the version and using npm In cPanel, Node.js is set up under “Setup Node.js App”. The tool offers 13 versions, from 10.24.1 to 24.x, and each...
Node.js, Python & Docker 161 Keeping a Node.js app running on a VPS with PM2 If you run node app.js in an SSH session, the application dies when the session closes, and does not return if the...
Node.js, Python & Docker 173 Node.js app in cPanel returns 503: the usual causes A 503 error on an application created under “Setup Node.js App” almost always means the same thing: the server tried...
Node.js, Python & Docker 137 Python in cPanel: virtual environments and pip In cPanel, Python runs through “Setup Python App”, which offers Python 2.7 and the 3.3 to 3.13 versions. Each...
Node.js, Python & Docker 123 Running a Flask or FastAPI application Flask runs on shared hosting with no tricks: it speaks WSGI, and that is what the Passenger behind “Setup Python...
Node.js, Python & Docker 121 Environment variables and secrets for your application An environment variable is a value the application reads from outside the code: the database password, an API key,...
Node.js, Python & Docker 143 Ports and firewall on a VPS: why your app is not reachable The application runs, answers on the server itself, and does not open from outside. In almost every case it is one...
Node.js, Python & Docker 130 Deploying a Next.js app: static export or Node server, and where each one fits Next.js can come out in two very different ways, and picking the wrong one lies behind almost every deployment...
Node.js, Python & Docker 109 Publishing a React or Vue site: the build folder, and the refresh that gives a 404 A site built with React or Vue (with Vite or with the older tools) does not run on the server: you build it on your...
Node.js, Python & Docker 101 Express says Cannot GET or returns 404 on every route: the causes The message Cannot GET / is Express saying: “I received a GET request for this path and none of my routes or files...
Node.js, Python & Docker 123 npm, yarn or pnpm: which to use, and why you keep only one lockfile npm, yarn and pnpm do the same job: they install the libraries your project needs. The short answer: use the package...
Node.js, Python & Docker 99 npm install fails with EACCES, ERESOLVE or out of memory: what to do When npm install fails, the message is usually long, but the cause fits one of half a dozen families. The short...
Node.js, Python & Docker 106 pip says externally-managed-environment: why it happens and the right fix You typed pip install on a VPS and got error: externally-managed-environment. Nothing is broken and you are not...
Node.js, Python & Docker 149 Where console.log and print output goes, and how to read your app logs On your computer, console.log (Node.js) and print (Python) show up on screen. A server has no screen, and the...
Node.js, Python & Docker 152 Permission denied in a Node.js or Python app on cPanel: ownership, modes and folders EACCES: permission denied in Node.js, PermissionError: [Errno 13] in Python. The application tried to do something...
Node.js, Python & Docker 121 CORS error between your front end and your API: how to fix it “Access to fetch at … has been blocked by CORS policy: No ‘Access-Control-Allow-Origin’ header is present”. It is...
Node.js, Python & Docker 137 Django DisallowedHost, CSRF failed and missing static files: the fixes You put Django online and three errors show up that nearly everyone meets: DisallowedHost, CSRF verification failed...
Node.js, Python & Docker 172 Deploying a Node.js or Python app from Git: pull, install, restart Publishing over FTP works, until the day you forget a file. With Git, deployment becomes the same sequence every...
Node.js, Python & Docker 136 WebSockets and Socket.IO: what to expect on cPanel and on a VPS A chat, a dashboard that updates by itself, live notifications: all of these need a connection that stays open...
Node.js, Python & Docker 122 Running Flask or Django with gunicorn and systemd on a VPS The server that ships with Flask and Django (flask run, manage.py runserver) is for development, not for the public....
Node.js, Python & Docker 123 FastAPI on a VPS: uvicorn workers, proxy headers and a service that restarts FastAPI speaks ASGI, and the server that runs it is uvicorn. On a VPS, the production recipe has four pieces:...
Node.js, Python & Docker 139 Installing or upgrading Node.js on a VPS: distro package, NodeSource or nvm You installed Node.js on a VPS and the version is too old for your project, or you need to move up. The short...
Node.js, Python & Docker 114 Error listen EADDRINUSE address already in use: finding what holds the port The application will not start and the message says Error: listen EADDRINUSE: address already in use :::3000. In...
Node.js, Python & Docker 158 Writing a Dockerfile for a Node.js or Python app The Dockerfile is the recipe that turns your application into an image: a package with the code, the libraries and...
Node.js, Python & Docker 133 Getting inside a running container: exec, cp and what not to edit there The container is running and you need to look inside: a file, a variable, run one of the application’s commands. The...
Node.js, Python & Docker 107 Docker containers that cannot reach each other or the host: networks explained An application in Docker “cannot see” the database, or two projects cannot talk to each other, or a container cannot...
Node.js, Python & Docker 105 Docker volumes or bind mounts: where your data lives and how to back it up What a container writes inside itself disappears when it is deleted. For data to survive, you connect it to...
Node.js, Python & Docker 125 Running Docker on a VPS safely: the precautions that matter Docker makes it easy to get an application running, which is why it also makes it easy to get a poorly protected one...
Node.js, Python & Docker 107 Nextcloud on a VPS: your own file storage, with Docker Compose The short answer: Nextcloud is an open-source program that gives you your own “Drive”: files, calendar and contacts,...
Node.js, Python & Docker 84 Running a Go program on a VPS as a service that restarts by itself The short answer: a Go program compiles to a single file, with nothing to install on the server. On a VPS, the right...