Docker entrypoint fix buffering (#4417)
Docker entrypoint fix buffering (#4417)

Remove output buffering during auto-install of FreshRSS and auto-creation of the default user.
We were only getting outputs at the end of each command, which was a problem for getting errors and progress, for instance when automatically importing a very large OPML
Alkarex/FreshRSS,aledeg/FreshRSS,aledeg/FreshRSS,FreshRSS/FreshRSS,FreshRSS/FreshRSS,Alkarex/FreshRSS,Alkarex/FreshRSS,aledeg/FreshRSS,Alkarex/FreshRSS,FreshRSS/FreshRSS,aledeg/FreshRSS,FreshRSS/FreshRSS