Add installer lib to docs build. Closes ##2925
Add installer lib to docs build. Closes ##2925

mobileoverlord/phoenix,keathley/phoenix,optikfluffel/phoenix,0x00evil/phoenix,Kosmas/phoenix,mitchellhenke/phoenix,mschae/phoenix,rafbgarcia/phoenix,evax/phoenix,Joe-noh/phoenix,nshafer/phoenix,keathley/phoenix,pap/phoenix,0x00evil/phoenix,michalmuskala/phoenix,phoenixframework/phoenix,jwarwick/phoenix,rafbgarcia/phoenix,pap/phoenix,nshafer/phoenix,phoenixframework/phoenix,Joe-noh/phoenix,jwarwick/phoenix,0x00evil/phoenix,dmarkow/phoenix,Gazler/phoenix,evax/phoenix,mschae/phoenix,optikfluffel/phoenix,mobileoverlord/phoenix,mitchellhenke/phoenix,rafbgarcia/phoenix,phoenixframework/phoenix,nshafer/phoenix,michalmuskala/phoenix,eksperimental/phoenix,Kosmas/phoenix,Gazler/phoenix,dmarkow/phoenix,eksperimental/phoenix,optikfluffel/phoenix