add search note, fix search highlight

Author: Frotty

.travis.yml

@@ -59,3 +59,9 @@ Adding a standard library doc page works almost the same as tutorials.
     - Edit the title, excerpt, date, color.
     - Change the `sections` to match the uri of the pages of your tutorial.
 * Write your new_doc pages, being sure to update the heading sections as necessary.
+
+## Building Search Index
+
+1. Set the key as environment variable `$env:ALGOLIA_API_KEY='PRIVATE_KEY'`
+
+2. Run `bundle exec jekyll algolia`

README.md

@@ -207,7 +207,7 @@
 }
 
 .ais-Highlight {
-  background-color: #508ac8;
+  background-color: var(--divider-darker);
 }
 
 .v-space {