add .htaccess for URL rewriting

content/.htaccess

+RewriteEngine on
+
+# We don't need more than that.
+RewriteOptions MaxRedirects=2
+
+# Redirect /foo/index.html to /foo/
+RewriteRule ^(|.*/)index\.html$ /$1 [R=301,L]
+
+# Redirect /foo/bar.html to /foo/bar only if a html file was requested by the
+# browser.  Without the condition the following rewrite rule leads to a
+# redirection loop.
+RewriteCond %{THE_REQUEST} ^[A-Z]{3,9}\ /.*\.html\ HTTP/
+RewriteRule ^(.*)\.html$ /$1 [R=301,L]
+
+# Rewrite /foo/bar to /foo/bar.html if the latter exists.
+RewriteCond %{REQUEST_FILENAME}.html -f
+RewriteRule ^(.*[^/])$ /$1.html [L]
+
+# Remove trailing slash if the requested directory does not exist.
+RewriteCond %{REQUEST_FILENAME} !-d
+RewriteRule ^(.*)/$  /$1 [R=301,L]