This package includes the raw jsreport.exe binary for linux embedded in the manifest stream. See more info in the similar windows based package jsreport.Binary.
The linux binary can be used the same way as windows one. Just make sure your linux hosting server includes libfontconfig. You can do this using the following snipped if you use the default VS generated dockerfile.
RUN apt-get update && \
apt-get install -y libfontconfig1