Fall back to scratchr2 in development

There's no reason to proxy individual paths when we want all of them to fall back to what we haven't migrated yet. This mirrors the behavior of production.

Resolves GH-194

server/index.js

@@ -12,7 +12,6 @@ var webpack = require('webpack');
 
 var handler = require('./handler');
 var log = require('./log');
-var proxies = require('./proxies.json');
 var routes = require('./routes.json');
 
 var isProduction = process.env.NODE_ENV === 'production';
@@ -72,21 +71,6 @@ if (typeof process.env.NODE_SENTRY_DSN === 'string') {
 }
 
 if (!isProduction) {
-    // Bind proxies in development
-    var proxyHost = process.env.PROXY_HOST || 'https://scratch.mit.edu';
-
-    app.use('/', proxy(proxyHost, {
-        filter: function (req) {
-            for (var i in proxies) {
-                if (req._path.indexOf(proxies[i]) === 0) return true;
-            }
-            return false;
-        },
-        forwardPath: function (req) {
-            return req._path;
-        }
-    }));
-
     // Use webpack-dev-server in development
     var compiler = webpack(require('../webpack.config.js'));
     app.use(webpackDevMiddleware(compiler, {
@@ -95,6 +79,10 @@ if (!isProduction) {
         }
     }));
 
+    // Fall back to scratchr2 in development
+    // This proxy middleware must come last
+    var proxyHost = process.env.PROXY_HOST || 'https://scratch.mit.edu';
+    app.use('/', proxy(proxyHost));
 }
 
 // Start listening

server/proxies.json

-[
-    "/accounts/",
-    "/csrf_token/",
-    "/fragment/",
-    "/get_image/",
-    "/i18n/setlang/",
-    "/login_retry/",
-    "/media/",
-    "/scratch_admin/homepage/clear-cache/",
-    "/session/",
-    "/site-api",
-    "/static/"
-]