i3: use feh to set ~/.wallpaper as wallpaper

I am copying ~/.face here.

conf/i3/config

@@ -2,7 +2,7 @@
 # Debian: i3 suckless-tools rxvt-unicode-256color j4-dmenu-desktop
 # gnome-screenshot i3lock sudo hibernate playerctl pulseaudio-utils
 # galculator network-manager-gnome redshift-gtk x11-xserver-utils
-# volumeicon-alsa
+# volumeicon-alsa feh
 
 # Search also for CHANGEME near the bottom
 
@@ -190,7 +190,10 @@ for_window [title="galculator"] floating enable
 # Autostarts
 exec --no-startup-id nm-applet
 exec --no-startup-id volumeicon
-exec --no-startup-id xsetroot -solid \#000000
+# Wallpaper, solid black
+#exec --no-startup-id xsetroot -solid \#000000
+# ~/.wallpaper as wallpaper
+exec --no-startup-id feh --bg-scale ~/.wallpaper
 
 # CHANGEME - weird autostart options that may not be suitable even for my other devices
 # Centre of Lauttasaari