new: [docker-host] add yaml.nanorc to handle coloration with yml file in nano

precise/base-0k/hooks/install.d/30-customize.sh

@@ -157,3 +157,44 @@ set is hlsearch ai ic scs
 nnoremap <esc><esc> :nohls<cr>
 
 EOF
+
+protect_pre_install /usr/share/nano/yaml.nanorc
+
+cat << EOF > /usr/share/nano/yaml.nanorc
+# Supports `YAML` files
+syntax "YAML" "\.ya?ml$"
+header "^(---|===)" "%YAML"
+
+## Keys
+color brightmagenta "^\s*[\$A-Za-z0-9_-]+\:"
+color brightmagenta "^\s*@[\$A-Za-z0-9_-]+\:"
+
+## Values
+color yellow ":\s.+$"
+## Booleans
+icolor brightcyan " (y|yes|n|no|true|false|on|off)$"
+## Numbers
+color brightred " [[:digit:]]+(\.[[:digit:]]+)?"
+## Arrays
+color red "\[" "\]" ":\s+[|>]" "^\s*- "
+## Reserved
+color green "(^| )!!(binary|bool|float|int|map|null|omap|seq|set|str) "
+
+## Comments
+color cyan "#.*$"
+
+## Errors
+##color ,red ":\w.+$"
+##color ,red ":'.+$"
+##color ,red ":".+$"
+##color ,red "\s+$"
+
+## Non closed quote
+color ,red "['\"][^['\"]]*$"
+
+## Closed quotes
+color yellow "['\"].*['\"]"
+
+## Equal sign
+color white ":( |$)"
+EOF