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---
title: "Developer Guide
---
This article is suitable for all those who want to develop on the Postfix dogu.
- It is necessary to install the following programs:
- git - see link.
- vagrant
- docker
- clone the repository:
git clone https://github.com/cloudogu/postfix.git
- A running Vagrant machine for the CES
The build process of the Dogus is always executed in the Vagrant machine.
- change to the root directory of the Postfix dogu (in vagrant)
- build the dogu
cesapp build .
Now the dogu should be built, updated, and started automatically.