Update reference docs with most recent version of brodocs (#4600)

* Update 1.7 apidocs with new brodocs

* Update 1.7 resource reference docs with new brodocs

* Update 1.7 kubectl reference docs with new brodocs

docs/api-reference/v1.7/node_modules/highlight.js/lib/languages/dockerfile.js

@@ -2,14 +2,14 @@ module.exports = function(hljs) {
   return {
     aliases: ['docker'],
     case_insensitive: true,
-    keywords: 'from maintainer expose env user onbuild',
+    keywords: 'from maintainer expose env arg user onbuild stopsignal',
     contains: [
       hljs.HASH_COMMENT_MODE,
       hljs.APOS_STRING_MODE,
       hljs.QUOTE_STRING_MODE,
       hljs.NUMBER_MODE,
       {
-        beginKeywords: 'run cmd entrypoint volume add copy workdir label healthcheck',
+        beginKeywords: 'run cmd entrypoint volume add copy workdir label healthcheck shell',
         starts: {
           end: /[^\\]\n/,
           subLanguage: 'bash'