pass ssh audit

bubble-server/src/main/resources/packer/roles/firewall/files/bubble_sshd.conf

@@ -7,3 +7,8 @@ KerberosAuthentication no
 GSSAPIAuthentication no
 X11Forwarding no
 PermitUserEnvironment no
+HostKey /etc/ssh/ssh_host_ed25519_key
+HostKey /etc/ssh/ssh_host_rsa_key
+KexAlgorithms curve25519-sha256@libssh.org
+Ciphers chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr
+MACs hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com,umac-128-etm@openssh.com