Any instructions to set this up as a windows service?
OpenSearchServer runs as a Java Web Application under Apache Tomcat. Here are
the step to succeed:
Install tomcat as a service using the Windows Service installer available here:
Copy the opensearchserver.war in the WebApp subdirectory of Tomcat. You can rename it ROOT.war.
Set up the OPENSEARCHSERVER_DATA environment variable to a folder where you store your indices.