Open Source Your Knowledge, Become a Contributor

Technology knowledge has to be shared and made accessible for free. Join the movement.

Create Content
Add a quiz

Goal & Prerequisites

The goal of this tutorial is to demonstrate how to build a basic playground on the platform.

You only need:

  • Git installed on your computer.
  • Basic knowledge about Git (clone, push)

The source code of this documentation is on GitHub (Documentation GitHub repository, please feel free to come up with proposals to improve it.

Create a playground

Go to the Create a playground page. Here, you can choose a template from a large selection of technologies. A skeleton playground based on the selected template is created in a new git repository.

Templates contain a working code example and some hints to help getting started.

You can also choose to create an empty playground.

Get your playground

To modify this playground, you need to be authenticated on’s Git Platform. To do so, you need to add a SSH key to your profile.

If you don’t already have an SSH key, execute ssh-keygen in your terminal. This command creates a public and a private key used to access your repository. (Check out GitHub Help for more information).

By default, the public key is located in ~/.ssh/ Copy your public key to your settings page.

Now that your key has been added, you can clone your repository using the origin URL provided on the playground page:

  git clone

Structure of a playground

Now that you have cloned the project, let's take a look at the folder structure:

  • techio.yml: This mandatory file must be present at the root of a playground’s git repository and contains: table of content of the playground, the references to the lesson files, and some other technical details for advanced usage (discuessed later in the documentation).
  • cover.png: This small image is displayed when your playground is displayed on the platform. Feel free to change it.
  • markdowns folder: This folder contains lesson statements.
  • project folder: We'll describe this later in the [Add a coding exercise](/getting started/ section of the documentation.


The techio.yml contains the following details:

  • title : The title of your playground which appears on the playground page.
  • plan: The plan of your playground is described as list of the lessons. Each lesson is composed of a title (which appears in the table of contents) and a statement as a link to a markdown file, relative to your root folder.

/!\ Do not use tab characters in this file, only spaces are allowed.

Have a look at the reference for all available options: techio.yml reference.

Statement & Markdown

Lesson statements are markdown files. Markdown is a simple syntax for basic formatting (links, images, quote text, code formatted text snippets, etc).

You can find a cheatsheet for markdown here.

The repository skeleton contains a folder with one lesson, under the markdowns folder.

Update your playground

First, change the content of markdowns/

# Hello world,

welcome to my course. This is the first lesson.

Then, change the techio.ymlto update the title of your playground:

title: Put your playground title here
  - title: Welcome
    statement: markdowns/

Deploy on

Now that you've changed your playground, you need to deploy it on Commit your changes and push them to using the following git commands:

git commit -a -m "My first changes"
git push origin master

Play with your playground

Come back to your playground page on It should have refreshed. Click "Preview" to play with your playground.

Add a new lesson

If you want to add a new lesson, follow these steps:

  • Create a markdown file: markdowns/
  • Edit this markdown and add content
  • Reference this markdown in techio.yml:
title: Put your playground title here
  - title: Part 1
    statement: markdowns/
  - title: Part 2
    statement: markdowns/
  • Push your changes
git commit -a -m "Add Part 2"
git push origin master
  • Navigate back to your playground on Once it has refreshed and finished building, you can preview your modified playground.

Share your playground

Once you're satisfied with your playground, it's time to share it with the world. You can make your plaground go 'live' by clicking the "Publish" button. It will shorten the url and publish it on your profile. You can also share the link to your friends.

Future updates to your plaground

When a playground is published and consumed by learners, you can freely update it with improvements and use the preview to see the results impacting users. Once you're satisfied, publish it again and the users will see the changes.

Open Source Your Knowledge: become a Contributor and help others learn. Create New Content