These are the public key fingerprints for Ruby:
ruby: ssh_host_key.pub = 01:21:16:c4:cd:43:d3:87:6d:fe:da:d1:ab:20:ba:4a
ruby: ssh_host_rsa_key.pub = eb:83:d9:ca:88:ba:e1:70:c9:a2:12:4b:61:ce:02:72
ruby: ssh_host_dsa_key.pub = ef:4c:f6:cd:83:88:d1:ad:13:50:f2:af:90:33:e9:70
These are the SHA256 hashes:
ruby: ssh_host_key.pub = SHA256:685FBToLX5PCXfUoCkDrxosNg7w6L08lDTVsjLiyLQU
ruby: ssh_host_rsa_key.pub = SHA256:D7HjrL4rsYDGagmihFRqy284kAcscqhthYdzT4w0aUo
ruby: ssh_host_dsa_key.pub = SHA256:XplFCsSu7+RDFC6V/1DGt+XXfBjDLk78DNP0crf341U
Perl is a family of programming languages.
From the Docker website: "A container image is a lightweight, stand-alone, executable package of a piece of software that includes everything needed to run it: code, runtime, system tools, system libraries, settings."