Custom docker/ yml colouring for nano

gistfile1.txt

#Create a custom yml colour scheme for nano

sudo tee /usr/share/nano/yaml.nanorc <<EOF >> /dev/null

# Supports  files
syntax "YAML" "\.ya?ml$"

## Keywords
icolor red "^(FROM|MAINTAINER|RUN|CMD|LABEL|EXPOSE|ENV|ADD|COPY|ENTRYPOINT|VOLUME|USER|WORKDIR|ONBUILD)[[:space:]]"

## Brackets & parenthesis
color brightgreen "(\(|\)|\[|\])"

## Double ampersand
color brightmagenta "&&"

## Comments
icolor cyan "^[[:space:]]*#.*$"

## Blank space at EOL
color ,green "[[:space:]]+$"

## Strings, single-quoted
color brightwhite "'([^']|(\\'))*'" "%[qw]\{[^}]*\}" "%[qw]\([^)]*\)" "%[qw]<[^>]*>" "%[qw]\[[^]]*\]" "%[qw]\$[^$]*\$" "%[qw]\^[^^]*\^" "%[qw]![^!]*!"

## Strings, double-quoted
color brightwhite ""([^"]|(\\"))*"" "%[QW]?\{[^}]*\}" "%[QW]?\([^)]*\)" "%[QW]?<[^>]*>" "%[QW]?\[[^]]*\]" "%[QW]?\$[^$]*\$" "%[QW]?\^[^^]*\^" "%[QW]?![^!]*!"

## Single and double quotes
color brightyellow "('|\")"

## 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) "

## Closed quotes
color yellow "['\"].*['\"]"

## Equal sign
color brightgreen ":( |$)"
EOF