Inputs is not a app, but a simple inputs.conf file that will also be on the forwarder.
inputs.conf
[monitor:///var/log/file.json]
sourcetype=MYJSON
props.conf
[MYJSON]
INDEXED_EXTRACTIONS=JSON
TIMESTAMP_FIELDS = Timestamp
If you are new, just do it all locally as a test on a locally installed Splunk instance, like your laptop, go through the UI to add data, select structured data, and ensure you are monitoring the file. Splunk will create the inputs and props for ya.
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