01 / BUILD
Build predictably
Define your environment in a Dockerfile. One image brings together your code, dependencies, and application settings.
code → ready-to-run imageSpace for your code
Containers.
No friction.
From your first line of code to a running application. A fresh take on building, shipping, and running containers.
BUILD. SHIP. RUN. / ALL IN ONE PLACE.
Familiar tools. A shared approach.
DockerfileOCI imagesComposeLinux containers
01 / Less busywork. More code.
Everything a container needs.
Nothing in your way.
The idea behind Claustrum: bring the entire application lifecycle into one clear, consistent workflow.
02 / SHIP
Ship without surprises
Use versioned images to give your team the same environment at every stage of development.
one image → the whole team03 / RUN
Stay in control
Ports, status, and logs, right alongside your application. Explore how it could work in the playground below.
run → observe02 / Interactive playground
From build
to your first
hello, world.
Switch between commands and run each scenario. Explore the idea behind Claustrum right in your browser.
01Define your environment
02Build your image
03Run your application
claustrum / playgroundDEMO
$ claustrum build -t hello-world .
Ready when you are.
Select “Run demo” to build your image.
Browser simulation · no real containers are created
03 / A familiar approach
Your code.
Its own space.
Containerization starts with a simple file. Your entire environment lives alongside your application.
↳ Dockerfileexample / Node.js
FROM node:24-alpine
WORKDIR /app
COPY package*.json ./
RUN npm ci --omit=dev
COPY . .
EXPOSE 3000
CMD ["node", "server.js"]Environment defined.
Room to focus on your idea.
This file defines your base image, dependencies, and startup command. It becomes part of your project and evolves with your code.
Claustrum explores this approach through familiar formats, straightforward steps, and a focus on everyday development.
Explore the build scenario04 / A few answers
Straight
to the point.
What is Claustrum?
Claustrum is a container platform concept inspired by the familiar Docker workflow: build an image, run an application, and inspect its status. Explore the idea and try interactive scenarios on this page.
Does the demo run real containers?
The demo simulates a proposed interface in your browser. It does not connect to a server engine or execute commands. You can repeat every scenario safely.
Do I need to install anything?
All you need to explore the demo is a browser. Commands beginning with claustrum illustrate a proposed platform interface; they are not an installable command-line tool.
What is a Dockerfile for?
A Dockerfile describes the contents of an application image: its base environment, files, dependencies, and startup command. The example above assumes a Node.js project with server.js and package-lock.json.
Your next move
Give your code some space.
Start with one command in the interactive playground.