Process:

• Find/create a docker-compose file for the one click app
• Convert yaml file to json
• Copy the content into the one click ap structure. See this for the reference: wordpress.json
• Variables are prefixed with $$cap
• There is one special variable called $$cap_appname which exists for all oneclick apps
• Varibles can be anywhere in the JSON and they will be replaced by what user enters
• Each variable must have id, label. It may also have defaultValue, validRegex, description.
• Other than image, environment, ports, volumes, depends_on, other parameters are ignored. Make sure they are not important.
• Instead of image in a service, you can use dockerfileLines which is an array of strings.
• Some webapps, use a non-standard HTTP port. For example, Adminer's Docker image uses port 8080. In this case, add containerHttpPort to the service. See adminer.json for example.

After creating your One-Click app json, like this, you need to test it before creating a Pull Request. Here is how you test it:

• Login to your CapRover dashboard
• Go to apps and click on Create One Click App
• Select the last option from the dropdown list "TEMPLATE"
• Copy and paste your JSON there, and click NEXT.
• Enter values and make sure it's working as expected.