Docker Hosting in India: Run Your Dockerfile Without a VPS

Most Docker hosting in India is a VPS with Docker installed. You still have to build images, run containers, set up a reverse proxy, renew certificates and clean up old images before the disk fills. If your app already has a Dockerfile, there is a shorter path: let a platform build the image from your repository and run it for you. This post covers when that makes sense and what to get right.

When to use your own Dockerfile

You need system packages

If your app needs something like ffmpeg, a PDF library or a specific OS package, a Dockerfile lets you install it.

You want the same image everywhere

The image you test on your laptop is the image that runs in production. Nothing is detected or guessed.

When you do not need one

For a plain Node.js or Python app, you can skip the Dockerfile. Voroa detects the language and builds it for you, as described in Node.js hosting in India.

Writing a Dockerfile that deploys well

A few habits make builds faster and images smaller. The Dockerfile best practices guide covers them in depth.

• Copy the lockfile and install before copying the code. Docker then reuses the install layer when only your code changes.
• Use a slim base image. Smaller images build and start faster.
• Use a multi-stage build when you compile assets, so build tools do not ship in the final image.
• Run one process. The container should start your server and nothing else.

How it works on Voroa

When you create the service, choose Docker as the runtime. Voroa then builds from your Dockerfile on every push to your branch, starts the new container, and switches traffic once it is ready. The guide is at Docker on Voroa.

Which port should the container listen on?

Voroa sets PORT. Listen on it if you can. If the container listens on exactly one other port, Voroa detects that and routes to it. A server bound only to 127.0.0.1 cannot be reached from outside the container.

Secrets in a Docker build

Do not bake API keys into the image - anyone with the image can read them. Pass them as environment variables at runtime. If the build itself needs a secret, see secrets and Docker builds.

What you still get

A Docker service is a normal web service. It gets a URL with HTTPS, custom domains, build and runtime logs, and rollback to the previous version. It runs in Mumbai and is billed in rupees with a GST invoice.

Docker on a VPS vs on a platform

On a VPS, docker compose up is only the start: you also run the reverse proxy, TLS renewal, log rotation, image cleanup and updates. On a platform those are handled, and a new release comes from a git push instead of an SSH session.

When the image builds but the container misbehaves

• Build is slow every time: code is copied before dependencies are installed, so the cache never hits.
• Container exits at once: the CMD runs a command that finishes instead of a server that stays up.
• URL does not answer: the server listens only on 127.0.0.1.
• Deploy refused with ports named: the container listens on more than one port; Voroa will not guess which one to route to, so listen on PORT.

Run your Dockerfile on Voroa

For sizes and prices, see Docker and web app hosting on Voroa, and start from the first deploy guide.