Merge pull request #185 from Start9Labs/sshing-guide-touchup

~root/.ssh didn't exist.  Now it will

site/source/user-manual/service-guides/bitcoin/blockchain-copy.rst

@@ -30,6 +30,7 @@ If you have already synced the Bitcoin blockchain to the tip on one Embassy, and
     .. code-block:: bash
 
         sudo -i
+        mkdir -m 0700 -p .ssh
         ssh-keygen -t ed25519 -N '' -f .ssh/embassy2.key
         chmod 600 .ssh/embassy2.key*
         cat .ssh/embassy2.key.pub