> I am not sure why is the default option is NO
There is no deep meaning here. Just to confirm if user has read the prompt. If user press enter without reading then it will not install as default option is `No`
>What is Gluu Gateway database mode
It means Gluu Gateway will user PostgreSQL as its database.
In DB-less mode, it will use declarative config file (kong.yml) for storage.
>why DB-less mode is recommended
@Mohammad.Abudayyeh could you reply this question