set extension classes in conf/neo4j-server.conf to:
org.neo4j.server.thirdparty_jaxrs_classes=eu.ehri.extension=/ehri
set wrapper user to neo4j
wrapper.user=neo4j
set memory in Neo4j wrapper, adding the line
wrapper.java.additional=-XX:MaxPermSize=256M
for Enterprise version, ensure that conf directory is writable by neo4j users so it can generate its own ssl certs