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When configuring your server in the Portal, you will encounter two related concepts: eggs and Docker images. Understanding the difference between them helps you configure your server correctly.

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What you’ll learn

  • What an egg is and what it controls
  • What a Docker image is and how to choose the right one
  • How eggs and Docker images work together
  • When to change each one

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What Is an Egg?

An egg is a server template that defines the overall type of server you are running. It specifies:
  • Which programming language or framework is used
  • What Docker images are available to choose from
  • The default startup command template
  • Which startup variables and defaults are pre-configured
  • What files are created on a fresh install
Examples of eggs available on Daki:
  • Node.js — for JavaScript applications and Discord bots
  • Python — for Python applications and Discord bots
  • Java — for Java applications (available on paid plans)
  • Rust — for Rust applications (available on paid plans)
  • Minecraft Java — for Minecraft game servers (game server plans)
You choose your egg when you create a server. On the Free Tier, only the Node.js and Python eggs are available. Paid plans give access to additional eggs. To change an existing server’s egg, go to the Settings tab. Note that changing the egg triggers a reinstall — creating a backup of your files beforehand is strongly recommended.

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What Is a Docker Image?

A Docker image is the specific version of a runtime that your server runs inside. Where the egg determines the language, the Docker image determines the version. For example, the Node.js egg may offer these Docker images:
  • Node.js 18
  • Node.js 20
  • Node.js 22
  • Node.js 24
You select the Docker image in the Startup tab.

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How They Work Together

Think of it this way:
ConceptAnalogySet in
EggChoosing to write in PythonSettings tab (or at server creation)
Docker imageChoosing Python 3.11 vs 3.12Startup tab
You pick the egg once (or change it rarely), and you adjust the Docker image whenever your project requires a different version.

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When to Change Each One

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Change the Docker image when:

  • You need a newer runtime version (e.g., upgrading from Node.js 18 to Node.js 22)
  • Your project requires a specific minor version for compatibility

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Change the egg when:

  • You want to switch programming languages entirely (e.g., from Node.js to Python)
  • You need a different default configuration or pre-defined install setup
Changing the egg triggers a reinstall. While files are not normally deleted automatically, certain files may be overwritten and an incompatible setup can result. Backups are strongly recommended before changing the egg. See Server Settings.

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Frequently Asked Questions

Use the Node.js egg for Discord.js/JavaScript bots, and the Python egg for discord.py/Python bots.
The available images are defined by the egg. If you don’t see the version you need, contact support — additional images may be available on request.
No. Changing only the Docker image (in the Startup tab) does not affect your files. Only changing the egg (in the Settings tab) triggers a reinstall.

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Next Steps