Hi everyone 
A short tutorial for Gladys developers explaining how to build a test Docker image.
Prerequisites:
Have a Docker Hub account
Step 1: Create these environment variables in GitHub Actions
Go to your Gladys fork, in the « Settings » of your repo:
Create these secrets:
DOCKERHUB_PASSWORD (Peut-être un mot de passe clé d'API)
DOCKERHUB_REPO (L'image Docker a pousser, exemple: `pierregilles/gladys-test` )
DOCKERHUB_USER (ton nom d'utilisateur sur DockerHub)
Step 2: Go to the « Actions » tab => « Build Gladys dev images »
Step 3: Start a build
Click « Run Workflow » and select the branch to build, the architecture to build, and the Docker tag that will be used!
The build takes about 4 hours if you select all platforms; if you want to save time, you can remove arm/v7 which is quite slow
Step 4 : 
That’s it, you can share the built Docker image which is available on the Docker image:
your_username/gladys:your_tag