README: Add UEFI installation instructions

README.md

@@ -48,6 +48,15 @@ Create the partition table (enter the indented lines in the repl):
       disk_toggle pmbr_boot
       quit
 
+On UEFI:
+
+    parted /dev/nvmeXnY
+      mktable GPT
+      mkpart ESP 1MiB 512MiB
+      mkpart root 512MiB 100%
+      set 1 esp on
+      quit
+
 Format encrypted partition and open it:
 
     cryptsetup luksFormat --type luks2 /dev/sdX3
@@ -70,6 +79,12 @@ Create filesystems:
     mkfs.btrfs -L root /dev/HOSTNAME-vg/root
     mkswap -L swap /dev/HOSTNAME-vg/swap
 
+On UEFI:
+
+    mkfs.fat -F 32 -n boot /dev/nvmeXnYpZ
+    mkfs.btrfs -L root /dev/HOSTNAME-vg/root
+    mkswap -L swap /dev/HOSTNAME-vg/swap
+
 Mount the file systems and activate swap:
 
     mount /dev/HOSTNAME-vg/root /mnt