remove outdated info and point to consolidated install documentation
remove outdated info and point to consolidated install documentation

fedspendingtransparency/data-act-broker-backend,fedspendingtransparency/data-act-validator,chambers-brian/SIG_Digital-Strategy_SI_ODP_Backend,fedspendingtransparency/data-act-broker-backend,chambers-brian/SIG_Digital-Strategy_SI_ODP_Backend