chore: add guideline to start docker container

Author: giacomoaccursi

README.md

@@ -1 +1,10 @@
-# operating-block-gateway
+# operating-block-gateway
+
+Create an environment file with:
+1. `AZURE_DT_CLIENT_ID`: the id of the app 
+2. `AZURE_DT_CLIENT_SECRET`: the secret of the app
+
+To run the microservice use the following docker command: 
+```
+sudo docker run -p 1880:1880 --group-add dialout ghcr.io/smartoperatingblock/operating-block-gateway:<latestVersion>
+```