gotty: add page (#3335)

pages/common/gotty.md

@@ -0,0 +1,16 @@
+# gotty
+
+> Share your terminal as a web application.
+> More information: <https://github.com/yudai/gotty>.
+
+- Share result of command:
+
+`gotty {{command}}`
+
+- Share with write permission:
+
+`gotty -w {{shell}}`
+
+- Share with credential (Basic Auth):
+
+`gotty -w -c {{username}}:{{password}} {{shell}}`