use hugo template for robots.txt

hugo.toml

@@ -3,7 +3,7 @@ languageCode = 'de-AT'
 title = 'IT-Syndikat'
 theme = "mainroad"
 pluralizelisttitles = false   # removes the automatically appended "s" on sidebar entries
-enableRobotsTXT = false
+enableRobotsTXT = true
 
 defaultContentLanguage = 'de'
 defaultContentLanguageInSubdir = false

layouts/robots.txt

@@ -44,3 +44,9 @@ User-agent: VelenPublicWebCrawler
 User-agent: Webzio-Extended
 User-agent: YouBot
 Disallow: /
+
+{{ range where .Data.Pages "Params.robotsdisallow" true }}
+Disallow: {{ .RelPermalink }}
+{{ end }}
+
+Sitemap: {{ "sitemap.xml" | absLangURL }}