InfraBox can store secret values for you, so you don't have to store passwords or other secret values in your repository. Login to the InfraBox Dashboard, select your project and go to the Settings tab. There you can create a secret with a name and value.
If you have created a secret you can make it available as a environment variable.
{
"version": 1,
"jobs": [{
...
"environment": {
"SOME_SECRET_VALUE": { "$secret": "NAME_OF_THE_SECRET" },
}
}]
}