alpine: add page (#1435)

pages/linux/alpine.md

@@ -0,0 +1,16 @@
+# alpine
+
+> A easy-to-use Email and Internet News program.
+> With pico/nano inspired interface and support for most modern Email services through IMAP.
+
+- Open alpine normally:
+
+`alpine`
+
+- Open alpine directly to the message composition screen to send an email to {{email_address}}:
+
+`alpine {{email_address}}`
+
+- Quit alpine:
+
+`'q' then 'y'`