r2e: add page (#4240)

pages/common/r2e.md

@@ -0,0 +1,25 @@
+# r2e
+
+> Forwards RSS feeds to an email address.
+> Requires a configured `sendmail` or smtp setup.
+> More information: <https://github.com/rss2email/rss2email>.
+
+- Create a new feed database that sends email to an email address:
+
+`r2e new {{email_address}}`
+
+- Subscribe to a feed:
+
+`r2e add {{feed_name}} {{feed_URI}}`
+
+- Send new stories to an email address:
+
+`r2e run`
+
+- List all feeds:
+
+`r2e list`
+
+- Delete a feed at a specified index:
+
+`r2e delete {{index}}`