We will be compiling the project from source.
For newcomers that means you will need git and golang compiler(see go.dev). There are a lot of tutorials for that.
Install the project: go install github.com/marekor555/imagiconv
Now try the app: imagiconv convertme.jpg png this command converts jpg to png
If the above command fails, saying that imagiconv command is not found.
You need to add go bin to path. And try again.