initial netlify + hugo setup (#268)

* barebones netlify + hugo setup

* add robots.txt

* fix publish directory

* set viewport

* layout fixes

* content layout improvements

* minor improvements

* add heading anchors

* content fixes

* seed index page from root README

* layout tweaks

* minimal footer

* fix bulleted list

* make link color fixed

* nits

* move markdown heading links into partial

* add navigation

* tweak collapse behavior

* improve layout

* remove under construction

* fix padding

* fix footer centering

* make user guide more prominent

netlify.toml

@@ -0,0 +1,11 @@
+# netlify configuration
+[build]
+base = "site/"
+publish = "site/public/"
+
+[build.environment]
+HUGO_VERSION = "0.53"
+
+[context.production.environment]
+# this controls our robots.txt
+HUGO_ENV = "production"