Include About/Privacy page content in page description

app.go

@@ -20,6 +20,7 @@ import (
 	"github.com/gorilla/schema"
 	"github.com/gorilla/sessions"
 	"github.com/manifoldco/promptui"
+	"github.com/writeas/go-strip-markdown"
 	"github.com/writeas/web-core/converter"
 	"github.com/writeas/web-core/log"
 	"github.com/writeas/writefreely/config"
@@ -98,6 +99,7 @@ func handleTemplatedPage(app *app, w http.ResponseWriter, r *http.Request, t *te
 	p := struct {
 		page.StaticPage
 		Content      template.HTML
+		PlainContent string
 		Updated      string
 
 		AboutStats *InstanceStats
@@ -124,6 +126,7 @@ func handleTemplatedPage(app *app, w http.ResponseWriter, r *http.Request, t *te
 			return err
 		}
 		p.Content = template.HTML(applyMarkdown([]byte(c)))
+		p.PlainContent = shortPostDescription(stripmd.Strip(c))
 		if updated != nil {
 			p.Updated = updated.Format("January 2, 2006")
 		}

pages/about.tmpl

@@ -1,4 +1,5 @@
 {{define "head"}}<title>About {{.SiteName}}</title>
+<meta name="description" content="{{.PlainContent}}">
 {{end}}
 {{define "content"}}
 	<div class="content-container snug">

pages/privacy.tmpl

@@ -1,4 +1,5 @@
 {{define "head"}}<title>{{.SiteName}} Privacy Policy</title>
+<meta name="description" content="{{.PlainContent}}">
 {{end}}
 {{define "content"}}<div class="content-container snug">
 	<h1>Privacy Policy</h1>