Include ssh into mbedtls host image

Signed-off-by: Leonardo Sandoval <leonardo.sandoval@linaro.org>
Change-Id: Id4fe95f0108ec22b5926ada19421be9cc498286d
diff --git a/focal-amd64-mbed-tls-host/setup-sshd b/focal-amd64-mbed-tls-host/setup-sshd
new file mode 100755
index 0000000..b0a5ed5
--- /dev/null
+++ b/focal-amd64-mbed-tls-host/setup-sshd
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+export HOME=/home/buildslave
+
+[ -z "${JENKINS_SLAVE_SSH_PUBKEY}" ] || {
+  mkdir ${HOME}/.ssh
+  echo "${JENKINS_SLAVE_SSH_PUBKEY}" > ${HOME}/.ssh/authorized_keys
+  chown -R buildslave:buildslave ${HOME}/.ssh
+  chmod 0700 -R ${HOME}/.ssh
+}
+
+exec /usr/sbin/sshd -D