You can check the documentation here: https://docs.neutron.org/
You can check out the build instructions here: https://docs.neutron.org/operators/running-a-node#installation-process
bash contrib/statesync.bashYou can check out the example contracts here: https://github.com/neutron-org/neutron-contracts
Integration tests are implemented here: https://github.com/neutron-org/neutron-integration-tests