Added Corrosion Fix for Heroku

Credits: https://github.com/BinBashBanana/Corrosion-Heroku (very epic person)

lib/server/middleware.js

@@ -0,0 +1,14 @@
+function address(arr = []) {
+    return function (ctx) {
+        ctx.address = arr[Math.floor(Math.random() * arr.length)];
+    };
+};
+
+function blacklist(arr = [], page = '') {
+    return function (ctx) {
+        if (arr.includes(ctx.url.hostname)) ctx.clientResponse.end(page);
+    };
+};
+
+exports.address = address;
+exports.blacklist = blacklist;