docs site: landing page, htaccess in the build output

docs/site/htaccess

@@ -0,0 +1,18 @@
+DirectoryIndex index.html
+
+<IfModule mod_rewrite.c>
+RewriteEngine On
+RewriteBase /noema/
+
+# One canonical URL per page: the index at the directory, pages without an
+# extension. The .html and trailing-slash forms redirect.
+RewriteRule ^index\.html$ /noema/ [R=301,L]
+RewriteCond %{THE_REQUEST} \s/+noema/([a-z0-9-]+)\.html(?:[?\s]|$) [NC]
+RewriteRule ^([a-z0-9-]+)\.html$ /noema/$1 [R=301,L]
+RewriteRule ^([a-z0-9-]+)/$ /noema/$1 [R=301,L]
+
+# Serve pages from their .html files.
+RewriteCond %{REQUEST_FILENAME} !-f
+RewriteCond %{REQUEST_FILENAME}.html -f
+RewriteRule ^([a-z0-9-]+)$ $1.html [L]
+</IfModule>