Use http by default (not https) to be consistent with Trellis

assets/config.json

@@ -13,7 +13,7 @@
     "src/**/*.php"
   ],
   "publicPath": "/app/themes/sage",
-  "devUrl": "https://example.dev",
-  "proxyUrl": "https://localhost:3000",
+  "devUrl": "http://example.dev",
+  "proxyUrl": "http://localhost:3000",
   "cacheBusting": "[name]_[hash:8]"
 }