Update ocpp.md with SteVe user experience (#256)

Added my experience with using SteVe

Author: jpiscaer

docs/ocpp.md

@@ -55,3 +55,6 @@ To enable gridrewards you also need to add a car:
 
 As final step you need to select the chargepoint in the "grid rewards" part of the app. Otherwise it will not enable it for you and allow you to charge using grid rewards. The detection of the car being connected is used from the SmartEvse, when you connect the car.
 
+## SteVe
+[@jpiscaer](https://github.com/jpiscaer) is using [SteVe](https://github.com/steve-community/steve), a free and open source OCPP back-end, available to self-host (running the default docker compose config in his case). The use case for using SteVe is to keep a list of charging transactions for reimbursement of charging costs from his company.
+With a monthly list of transactions and a read-out of my (Inepro PRO380-Mod) kWh meter, he can satisfy the Belastingdienst's requirements. Note that he's not automating the payouts; he does the financial transactions manually, so he doesn't need a payment provider (nor does SteVe support this). If you need automatic payouts, look for Tap Electric or Monta. Since the EVSE is on a private driveway, he doesn't want or need to use RFID tags; he's has set the OCPP configuration to 'auto-authorize', and has configured SteVe to accept all requests through a dummy rfid tag. This way, he only uses SteVe to keep a list of charging transactions, and he doesn't allow (keep track of) guest usage, public usage etc.