chg: pkg: externalized ``git.0k.io`` access patching code from freezer code.

.drone.d/update-pre-build.d/ensure-git-0k-access.sh

@@ -0,0 +1,23 @@
+## These instruction are sent to ``dupd`` on target image (doodba)
+
+set -ex
+
+mkdir -p /root/.ssh
+
+curl https://docker.0k.io/get/vm_git_access_id_rsa > /root/.ssh/id_rsa || {
+    echo "Fatal: Could not retrieve http://docker.0k.io/get/vm_git_access_id_rsa ..." >&2
+    exit 1
+}
+## Not so usefull as it is public !
+chmod 0600 /root/.ssh/id_rsa
+
+ssh-keyscan -H -p 10022 git.0k.io > /root/.ssh/known_hosts
+chmod 600 /root/.ssh/known_hosts
+
+cat <<EOF > /root/.ssh/config
+
+Host git.0k.io
+    User vm-user
+    Port 10022
+
+EOF