Add footer

src/server/web/views/info.pug

@@ -58,6 +58,10 @@ html
 				padding: 4px 5px;
 			}
 
+			footer {
+				text-align: center;
+			}
+
 	body
 		main
 			header
@@ -127,4 +131,5 @@ html
 						each emoji in emojis
 							| :#{emoji.name}:
 							= ' '
-
+			footer
+				p Misskey is open-source software. <a href="https://github.com/syuilo/misskey">View source</a>