diff --git a/README.md b/README.md
index 7d20426..d5da347 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,13 @@ Minimal Delegated License Service (DLS).
 This service can be used without internet connection.
 Only the clients need a connection to this service on configured port.
 
+## ToDo#'s
+
+- provide `.deb` package (WIP)
+- migrate from `dataset` to `sqlalchemy` (WIP)
+- migrate from `fastapi` to `flask`
+- Support http mode for using external https proxy
+
 ## Endpoints
 
 ### `GET /`
@@ -42,7 +49,7 @@ There are some more internal api endpoints for handling authentication and lease
 Docker-Images are available here:
 
 - [Docker-Hub](https://hub.docker.com/repository/docker/collinwebdesigns/fastapi-dls): `collinwebdesigns/fastapi-dls:latest`
-- GitLab-Registry: `registry.git.collinwebdesigns.de/oscar.krause/fastapi-dls/main:latest`
+- [GitLab-Registry](https://git.collinwebdesigns.de/oscar.krause/fastapi-dls/container_registry): `registry.git.collinwebdesigns.de/oscar.krause/fastapi-dls/main:latest`
 
 **Run this on the Docker-Host**
 
@@ -91,7 +98,7 @@ volumes:
   dls-db:
 ```
 
-## Debian
+## Debian/Ubuntu (manual method using `git clone`)
 
 Tested on `Debian 11 (bullseye)`, Ubuntu may also work.
 
@@ -112,6 +119,7 @@ python3 -m venv venv
 source venv/bin/activate
 pip install -r requirements.txt
 deactivate
+chown -R www-data:www-data $WORKING_DIR
 ```
 
 **Create keypair and webserver certificate**
@@ -125,35 +133,34 @@ openssl genrsa -out $WORKING_DIR/instance.private.pem 2048
 openssl rsa -in $WORKING_DIR/instance.private.pem -outform PEM -pubout -out $WORKING_DIR/instance.public.pem
 # create ssl certificate for integrated webserver (uvicorn) - because clients rely on ssl
 openssl req -x509 -nodes -days 3650 -newkey rsa:2048 -keyout  $WORKING_DIR/webserver.key -out $WORKING_DIR/webserver.crt
+chown -R www-data:www-data $WORKING_DIR
 ```
 
 **Test Service**
 
+This is only to test whether the service starts successfully.
+
 ```shell
 cd /opt/fastapi-dls/app
-/opt/fastapi-dls/venv/bin/uvicorn main:app \
-  --host 127.0.0.1 --port 443 \
-  --app-dir /opt/fastapi-dls/app \
-  --ssl-keyfile /opt/fastapi-dls/app/cert/webserver.key \
-  --ssl-certfile /opt/fastapi-dls/app/cert/webserver.crt \
-  --proxy-headers
+su - www-data -c "/opt/fastapi-dls/venv/bin/uvicorn main:app --app-dir=/opt/fastapi-dls/app"
 ```
 
 **Create config file**
 
 ```shell
-cat <<EOF > /etc/fastapi-dls.env
+cat <<EOF > /etc/fastapi-dls/env
 DLS_URL=127.0.0.1
 DLS_PORT=443
 LEASE_EXPIRE_DAYS=90
 DATABASE=sqlite:////opt/fastapi-dls/app/db.sqlite
-EOF 
+
+EOF
 ```
 
 **Create service**
 
 ```shell
-cat <<EOF >/etc/systemd/system/fastapi-dls.service
+cat <<EOF > /etc/systemd/system/fastapi-dls.service
 [Unit]
 Description=Service for fastapi-dls
 After=network.target
@@ -161,27 +168,30 @@ After=network.target
 [Service]
 User=www-data
 Group=www-data
+AmbientCapabilities=CAP_NET_BIND_SERVICE
 WorkingDirectory=/opt/fastapi-dls/app
-ExecStart=/opt/fastapi-dls/venv/bin/uvicorn \
-  --host $DLS_URL --port $DLS_PORT \
+EnvironmentFile=/etc/fastapi-dls.env
+ExecStart=/opt/fastapi-dls/venv/bin/uvicorn main:app \
+  --env-file /etc/fastapi-dls.env \
+  --host \$DLS_URL --port \$DLS_PORT \
   --app-dir /opt/fastapi-dls/app \
   --ssl-keyfile /opt/fastapi-dls/app/cert/webserver.key \
   --ssl-certfile /opt/fastapi-dls/app/cert/webserver.crt \
   --proxy-headers
-EnvironmentFile=/etc/fastapi-dls.env
 Restart=always
 KillSignal=SIGQUIT
-Type=notify
+Type=simple
 StandardError=syslog
 NotifyAccess=all
 
 [Install]
 WantedBy=multi-user.target
+
 EOF
 ```
 
 Now you have to run `systemctl daemon-reload`. After that you can start service
-with `systemctl start fastapi-dls.service`.
+with `systemctl start fastapi-dls.service` (and enable autostart with `systemctl enable fastapi-dls.service`).
 
 # Configuration
 
@@ -194,7 +204,7 @@ with `systemctl start fastapi-dls.service`.
 | `DATABASE`          | `sqlite:///db.sqlite` | See [official dataset docs](https://dataset.readthedocs.io/en/latest/quickstart.html) |
 | `CORS_ORIGINS`      | `https://{DLS_URL}`   | Sets `Access-Control-Allow-Origin` header (comma separated string)                    |
 
-# Installation (Client)
+# Setup (Client)
 
 **The token file has to be copied! It's not enough to C&P file contents, because there can be special characters.**
 
@@ -235,6 +245,12 @@ Currently, there are no known issues.
 
 ## Windows
 
+### Required cipher on Windows Guests (e.g. managed by domain controller with GPO)
+
+It is required to enable `SHA1` (`TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA_P521`) in [windows cipher suite](https://learn.microsoft.com/en-us/windows-server/security/tls/manage-tls).
+
+### Multiple Display Container LS Instances
+
 On Windows on some machines there are running two or more instances of `NVIDIA Display Container LS`. This causes a
 problem on licensing flow. As you can see in the logs below, there are two lines with `NLS initialized`, each prefixed
 with `<1>` and `<2>`. So it is possible, that *daemon 1* fetches a valid license through dls-service, and *daemon 2*
diff --git a/app/main.py b/app/main.py
index 75ec633..3450241 100644
--- a/app/main.py
+++ b/app/main.py
@@ -61,8 +61,8 @@ LEASE_EXPIRE_DELTA = relativedelta(days=int(getenv('LEASE_EXPIRE_DAYS', 90)))
 
 DLS_URL = str(getenv('DLS_URL', 'localhost'))
 DLS_PORT = int(getenv('DLS_PORT', '443'))
-SITE_KEY_XID = getenv('SITE_KEY_XID', '00000000-0000-0000-0000-000000000000')
-INSTANCE_REF = '00000000-0000-0000-0000-000000000000'
+SITE_KEY_XID = str(getenv('SITE_KEY_XID', '00000000-0000-0000-0000-000000000000'))
+INSTANCE_REF = str(getenv('INSTANCE_REF', '00000000-0000-0000-0000-000000000000'))
 INSTANCE_KEY_RSA = load_key(join(dirname(__file__), 'cert/instance.private.pem'))
 INSTANCE_KEY_PUB = load_key(join(dirname(__file__), 'cert/instance.public.pem'))
 
@@ -194,6 +194,33 @@ async def auth_v1_origin(request: Request):
     return JSONResponse(response)
 
 
+# venv/lib/python3.9/site-packages/nls_services_auth/test/test_origins_controller.py
+# { "environment" : { "guest_driver_version" : "guest_driver_version", "hostname" : "myhost", "ip_address_list" : [ "192.168.1.129" ], "os_version" : "os_version", "os_platform" : "os_platform", "fingerprint" : { "mac_address_list" : [ "e4:b9:7a:e5:7b:ff" ] }, "host_driver_version" : "host_driver_version" }, "origin_ref" : "00112233-4455-6677-8899-aabbccddeeff" }
+@app.post('/auth/v1/origin/update')
+async def auth_v1_origin_update(request: Request):
+    j, cur_time = json.loads((await request.body()).decode('utf-8')), datetime.utcnow()
+
+    origin_ref = j['origin_ref']
+    logging.info(f'> [  update  ]: {origin_ref}: {j}')
+
+    data = dict(
+        origin_ref=origin_ref,
+        hostname=j['environment']['hostname'],
+        guest_driver_version=j['environment']['guest_driver_version'],
+        os_platform=j['environment']['os_platform'], os_version=j['environment']['os_version'],
+    )
+
+    db['origin'].upsert(data, ['origin_ref'])
+
+    response = {
+        "environment": j['environment'],
+        "prompts": None,
+        "sync_timestamp": cur_time.isoformat()
+    }
+
+    return JSONResponse(response)
+
+
 # venv/lib/python3.9/site-packages/nls_services_auth/test/test_auth_controller.py
 # venv/lib/python3.9/site-packages/nls_core_auth/auth.py - CodeResponse
 # {"code_challenge":"...","origin_ref":"00112233-4455-6677-8899-aabbccddeeff"}