how to generate http report by command line by SoapUI free version

Using command line, it only generates Junit xml report.

In order to generate html report, you need to transform it from xml to html to see nice report.

In order to do that, you could write apache-ant build script.

If you like to use, docker image, that is readily available. All you need to do is provide your project and specify where to generate the report.

For more details, see below thread.
https://community.smartbear.com/t5/SoapUI-Open-Source/Docker-Image-for-SoapUI-5-4-0/m-p/154860/highlight/true#M25716