Add go devshell

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/installer/users/nick/default.nix

@@ -81,7 +81,7 @@ in
         hostname = "github.com";
         user = "git";
         identityFile = "${home}/.ssh/ssh_git_personal_ed25519_key";
-        extraOptions.StrictHostKeyChecking = "accept-new";
+        extraOptions.StrictHostKeyChecking = "no";
       };
     };
   };