Add instructions for contributing
Add instructions for contributing

[#89505176]

Signed-off-by: Matt Horan <eddfe3ddf47abba1865e969c360708dff8ab1fba@pivotal.io>

piyushcoolkarni/cfbuildpack,sks/staticfile-buildpack,hpcloud/staticfile-buildpack,dhaywael/static-buildpack,dattnguyen82/staticfile-buildpack,jockhip12/mybuildpack,muymoo/staticfile-buildpack,piyushcoolkarni/cfbuildpack,cloudfoundry/staticfile-buildpack,yepengxj/staticfile-buildpack,kevinSuttle/staticfile-buildpack,sks/staticfile-buildpack,jmcarp/staticfile-buildpack,dattnguyen82/staticfile-buildpack,yepengxj/staticfile-buildpack,jockhip12/mybuildpack,cloudfoundry/staticfile-buildpack,piyushcoolkarni/cfbuildpack,kevinSuttle/staticfile-buildpack,SaberZaabouti/myBuildpack,mukopikmin/reverse-proxy-buildpack,dattnguyen82/staticfile-buildpack,ozzyjohnson/staticfile-buildpack,yepengxj/staticfile-buildpack,jmcarp/staticfile-buildpack,jockhip12/mybuildpack,SaberZaabouti/myBuildpack,piyushcoolkarni/cfbuildpack,dhaywael/static-buildpack,sks/staticfile-buildpack,dhaywael/static-buildpack,muymoo/staticfile-buildpack,jmcarp/staticfile-buildpack,ozzyjohnson/staticfile-buildpack,kevinSuttle/staticfile-buildpack,morikat/staticfile-buildpack,jockhip12/mybuildpack,morikat/staticfile-buildpack,joek/staticfile-buildpack,morikat/staticfile-buildpack,muymoo/staticfile-buildpack,cloudfoundry/staticfile-buildpack,SaberZaabouti/myBuildpack,joek/staticfile-buildpack,SaberZaabouti/myBuildpack,sks/staticfile-buildpack,ozzyjohnson/staticfile-buildpack,dattnguyen82/staticfile-buildpack,SaberZaabouti/myBuildpack,dhaywael/static-buildpack,morikat/staticfile-buildpack,joek/staticfile-buildpack,jockhip12/mybuildpack,hpcloud/staticfile-buildpack,yepengxj/staticfile-buildpack,hpcloud/staticfile-buildpack,ozzyjohnson/staticfile-buildpack,kevinSuttle/staticfile-buildpack,dhaywael/static-buildpack,jmcarp/staticfile-buildpack,mukopikmin/reverse-proxy-buildpack,joek/staticfile-buildpack,cloudfoundry/staticfile-buildpack,muymoo/staticfile-buildpack,mukopikmin/reverse-proxy-buildpack,hpcloud/staticfile-buildpack