how can generate thie JSON file with the following call: $ Orthanc --config=Configuration.json. please as a beguiner i am blocked.thanks!!
All these intro steps are documented in the Orthanc Manual:
https://book.orthanc-server.com/index.html
Download Orthanc below and follow the guide above:
https://www.orthanc-server.com/download.php
Hello Barno,
I had the same problem and I think I found it:
The configuration.json file is in your installation directory in the folder configuration. It’s just another name : orthanc.jsonC:\program files\orthanc server\Configuration\orthanc.json
The file is automatically create in the installation.
Change inside the orthanc.json :
“RemoteAccessAllowed” to “true”
and after you can access to the page:
http://youripadress:8042/app/explorer.html
or
http://youripadress:8042/app/explorer.html#upload
I just discover in the same moment. So funny 
Hope this information can help you.
Best regards,
Bruno