refactor: refactor migrations and add fixtures

feat: introduce key-value store
feat: imprint page (resolve #23)
chore: remove default user
chore: remove packr

routes/routes.go

@@ -30,6 +30,9 @@ func loadTemplates() {
 		"getVersion": func() string {
 			return models.GetConfig().Version
 		},
+		"htmlSafe": func(html string) template.HTML {
+			return template.HTML(html)
+		},
 	})
 	templates = make(map[string]*template.Template)