=> Bootstrap dependency digest>=20010302: found digest-20190127
=> Fetching rack-contrib-2.3.0.gem
=> Total size: 27648 bytes
=> Checksum SHA1 OK for rack-contrib-2.3.0.gem
=> Checksum RMD160 OK for rack-contrib-2.3.0.gem
=> Checksum SHA512 OK for rack-contrib-2.3.0.gem