diff --git a/README.md b/README.md
index 28a7bdc..bb590f0 100644
--- a/README.md
+++ b/README.md
@@ -7,11 +7,31 @@ Compatibility tested with official DLS 2.0.1.
 This service can be used without internet connection.
 Only the clients need a connection to this service on configured port.
 
+**Official Links**
+
+- https://git.collinwebdesigns.de/oscar.krause/fastapi-dls
+- https://gitea.publichub.eu/oscar.krause/fastapi-dls
+- Docker Image `collinwebdesigns/fastapi-dls:latest`
+
+*All other repositories are forks!*
+
+---
+
 [[_TOC_]]
 
-
 # Setup (Service)
 
+**System requirements**:
+
+- 256mb ram
+- 4gb hdd
+
+Tested with Ubuntu 22.10 (from Proxmox templates), actually its consuming 100mb ram and 750mb hdd.
+
+**Prepare your system**:
+
+- Make sure your timezone is set correct on you fastapi-dls server and your client
+
 ## Docker
 
 Docker-Images are available here:
diff --git a/app/main.py b/app/main.py
index d4bd819..9218695 100644
--- a/app/main.py
+++ b/app/main.py
@@ -24,7 +24,6 @@ from starlette.templating import Jinja2Templates
 from util import load_key, load_file
 from orm import Origin, Lease, init as db_init, migrate
 
-logger = logging.getLogger()
 load_dotenv('../version.env')
 
 TZ = datetime.now().astimezone().tzinfo
@@ -51,6 +50,7 @@ TOKEN_EXPIRE_DELTA = relativedelta(days=int(env('TOKEN_EXPIRE_DAYS', 1)), hours=
 LEASE_EXPIRE_DELTA = relativedelta(days=int(env('LEASE_EXPIRE_DAYS', 90)), hours=int(env('LEASE_EXPIRE_HOURS', 0)))
 LEASE_RENEWAL_PERIOD = float(env('LEASE_RENEWAL_PERIOD', 0.15))
 LEASE_RENEWAL_DELTA = timedelta(days=int(env('LEASE_EXPIRE_DAYS', 90)), hours=int(env('LEASE_EXPIRE_HOURS', 0)))
+CLIENT_TOKEN_EXPIRE_DELTA = relativedelta(years=12)
 CORS_ORIGINS = str(env('CORS_ORIGINS', '')).split(',') if (env('CORS_ORIGINS')) else [f'https://{DLS_URL}']
 
 jwt_encode_key = jwk.construct(INSTANCE_KEY_RSA.export_key().decode('utf-8'), algorithm=ALGORITHMS.RS256)
@@ -65,6 +65,8 @@ app.add_middleware(
     allow_headers=['*'],
 )
 
+logging.basicConfig()
+logger = logging.getLogger(__name__)
 logger.setLevel(logging.DEBUG if DEBUG else logging.INFO)
 
 
@@ -191,7 +193,7 @@ async def _lease_delete(request: Request, lease_ref: str):
 @app.get('/-/client-token', summary='* Client-Token', description='creates a new messenger token for this service instance')
 async def _client_token():
     cur_time = datetime.utcnow()
-    exp_time = cur_time + relativedelta(years=12)
+    exp_time = cur_time + CLIENT_TOKEN_EXPIRE_DELTA
 
     payload = {
         "jti": str(uuid4()),
@@ -528,6 +530,18 @@ async def leasing_v1_lessor_shutdown(request: Request):
     return JSONr(response)
 
 
+@app.on_event('startup')
+async def app_on_startup():
+    logger.info(f'''
+    Using timezone: {str(TZ)}. Make sure this is correct and match your clients!
+    
+    Your clients renew their license every {str(Lease.calculate_renewal(LEASE_RENEWAL_PERIOD, LEASE_RENEWAL_DELTA))}.
+    If the renewal fails, the license is {str(LEASE_RENEWAL_DELTA)} valid.
+    
+    Your client-token file (.tok) is valid for {str(CLIENT_TOKEN_EXPIRE_DELTA)}.
+    ''')
+
+
 if __name__ == '__main__':
     import uvicorn
 
diff --git a/app/orm.py b/app/orm.py
index ee4e084..d3c795e 100644
--- a/app/orm.py
+++ b/app/orm.py
@@ -57,12 +57,12 @@ class Origin(Base):
         session.close()
 
     @staticmethod
-    def delete(engine: Engine, origins: ["Origin"] = None) -> int:
+    def delete(engine: Engine, origin_refs: [str] = None) -> int:
         session = sessionmaker(bind=engine)()
-        if origins is None:
+        if origin_refs is None:
             deletions = session.query(Origin).delete()
         else:
-            deletions = session.query(Origin).filter(Origin.origin_ref in origins).delete()
+            deletions = session.query(Origin).filter(Origin.origin_ref in origin_refs).delete()
         session.commit()
         session.close()
         return deletions
@@ -170,6 +170,14 @@ class Lease(Base):
         renew = delta.total_seconds() * LEASE_RENEWAL_PERIOD
         renew = datetime.timedelta(seconds=renew)
         expires = delta - renew  # 19.2
+
+        import datetime
+        LEASE_RENEWAL_PERIOD=0.15  # 15%
+        delta = datetime.timedelta(days=90)
+        renew = delta.total_seconds() * LEASE_RENEWAL_PERIOD
+        renew = datetime.timedelta(seconds=renew)
+        expires = delta - renew  # 76 days, 12:00:00 hours
+
         """
         renew = delta.total_seconds() * renewal_period
         renew = timedelta(seconds=renew)