clarify running of server in README
clarify running of server in README

marcesher/morgue,hootsuite/morgue,nkammah/morgue,bowlofstew/morgue,bowlofstew/morgue,umair-hussain-hs/morgue,jacques/morgue,mmercedes/morgue,etsy/morgue,postfix/morgue,jacques/morgue,nkammah/morgue,hootsuite/morgue,mmercedes/morgue,SocalNick/morgue,postfix/morgue,dveeden/morgue,umair-hussain-hs/morgue,SocalNick/morgue,nlsun/morgue,etsy/morgue,dveeden/morgue,nlsun/morgue,marcesher/morgue