Add cryptsetup remote ssh unlock

source/resources/apps/cryptsetup/README.md

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+apt install dropbear-initramfs
+
+/etc/dropbear-initramfs/config
+DROPBEAR_OPTIONS="-p611 -s -j -k -I 60"
+
+# Add RSA keys here (no ed25519 ?)
+vim /etc/dropbear-initramfs/authorized_keys
+
+# update initramfs
+update-initramfs -u
+
+# Set up grub
+vim /etc/default/grub
+# Like:
+GRUB_CMDLINE_LINUX_DEFAULT="ip=client-ip::gw-ip:netmask"
+# Example:
+GRUB_CMDLINE_LINUX_DEFAULT="ip=10.1.1.100::10.1.1.1:255.255.255.0"
+
+# update grub
+update-grub
+
+# Set up ~/.ssh/config for client to connect to dropbear/ssh:
+Host sf-001-disk
+    Hostname 10.1.1.100
+    Port 611
+    User root
+    PasswordAuthentication no
+    IdentityFile ~/.ssh/id_rsa
+
+# Then when system boots up, ssh to it:
+ssh sf-001-disk
+
+# When logged in, run:
+cryptroot-unlock