Fix dockerfile (#4447)
Fix dockerfile (#4447)


rafbgarcia/phoenix,rafbgarcia/phoenix,optikfluffel/phoenix,phoenixframework/phoenix,0x00evil/phoenix,nshafer/phoenix,rafbgarcia/phoenix,nshafer/phoenix,nshafer/phoenix,phoenixframework/phoenix,optikfluffel/phoenix,0x00evil/phoenix,0x00evil/phoenix,optikfluffel/phoenix,phoenixframework/phoenix