Heroku server restart makes my script tag disappear on storefront/order-status page

[EugeneCXY]

Hey,

I've been stuck on this error for some time. Can't seem to find any docs anywhere

I have made a script tag through graphql that displays on the order status page but every time Heroku relocates dyno to a new server(cannot be avoided apparently) the server.js has to restart and requires an auth to access the script tag again.

Here is the error on the logs of heroku  

I am currently using the Shopify-Cli code, I have not changed much to it except some console logs to understand the structure.

import "@babel/polyfill";
import dotenv from "dotenv";
import "isomorphic-fetch";
import createShopifyAuth, { verifyRequest } from "@shopify/koa-shopify-auth";
import Shopify, { ApiVersion } from "@shopify/shopify-api";
import Koa from "koa";
import next from "next";
import Router from "koa-router";
import {storeCallback,deleteCallback,loadCallback} from './sessiondb.js'


dotenv.config();
const port = parseInt(process.env.PORT, 10) || 8081;
const dev = process.env.NODE_ENV !== "production";
const app = next({
  dev,
});
const handle = app.getRequestHandler();

console.log("1")
Shopify.Context.initialize({
  API_KEY: process.env.SHOPIFY_API_KEY,
  API_SECRET_KEY: process.env.SHOPIFY_API_SECRET,
  SCOPES: process.env.SCOPES.split(","),
  HOST_NAME: process.env.HOST.replace(/https:\/\//, ""),
  API_VERSION: ApiVersion.April21,
  IS_EMBEDDED_APP: true,
  // This should be replaced with your preferred storage strategy
  SESSION_STORAGE: new Shopify.Session.CustomSessionStorage(
    storeCallback,
    loadCallback,
    deleteCallback

  ),

});

// Storing the currently active shops in memory will force them to re-login when your server restarts. You should
// persist this object in your app.
const ACTIVE_SHOPIFY_SHOPS = {};

// const handleWebhookRequest = async (topic, shop, webhookRequestBody) => {
//   console.log("handle webhook" + shop)
//   // this handler is triggered when a webhook is sent by the Shopify platform to your application
// }

app.prepare().then(async () => {
  console.log("2")
  const server = new Koa();
  const router = new Router();
  server.keys = [Shopify.Context.API_SECRET_KEY];
  // Shopify.Webhooks.Registry.webhookRegistry.push({path: "/webhooks", topic: "ORDERS_PAID", webhookHandler: handleWebhookRequest});
  server.use(
    createShopifyAuth({
      async afterAuth(ctx) {
        // Access token and shop available in ctx.state.shopify
        console.log("3")
        const { shop, accessToken, scope } = ctx.state.shopify;
        console.log("IM TESTING THIS"+ shop,accessToken,scope);
        const host = ctx.query.host;
        ACTIVE_SHOPIFY_SHOPS[shop] = scope;
        console.log("4")
        const response = await Shopify.Webhooks.Registry.register({
          shop,
          accessToken,
          path: "/webhooks",
          topic: "APP_UNINSTALLED",
          webhookHandler: async (topic, shop, body) =>
            delete ACTIVE_SHOPIFY_SHOPS[shop],
        });

        if (!response.success) {
          console.log(
            `Failed to register APP_UNINSTALLED webhook: ${response.result}`
          );
        }
        console.log("5")
        // Redirect to app with shop parameter upon auth
        ctx.redirect(`/?shop=${shop}&host=${host}`);
      },
    })
  );

  const handleRequest = async (ctx) => {
    console.log("6")
    await handle(ctx.req, ctx.res);
    ctx.respond = false;
    ctx.res.statusCode = 200;
  };

  router.post("/webhooks", async (ctx) => {
    try {
      console.log("7")
      await Shopify.Webhooks.Registry.process(ctx.req, ctx.res);
      console.log(`Webhook processed, returned status code 200`);
    } catch (error) {
      console.log(`Failed to process webhook: ${error}`);
    }
  });



  router.post(
    "/graphql",
    verifyRequest({ returnHeader: true }),
    async (ctx, next) => {
      console.log("8")
      await Shopify.Utils.graphqlProxy(ctx.req, ctx.res);
    }
  );

  router.get("(/_next/static/.*)", handleRequest); // Static content is clear
  router.get("/_next/webpack-hmr", handleRequest); // Webpack content is clear
  // router.get("(.*)", verifyRequest(),handleRequest);
  router.get("(.*)", async (ctx) => {
    console.log("9")
    const shop = ctx.query.shop;
    console.log("get request "+ shop)
    // This shop hasn't been seen yet, go through OAuth to create a session
    if (ACTIVE_SHOPIFY_SHOPS[shop] === undefined) {
      console.log("its getting redirected")
      ctx.redirect(`/auth?shop=${shop}`);
    } else {
      await handleRequest(ctx);
    }
  });


  server.use(router.allowedMethods());
  server.use(router.routes());
  server.listen(port, () => {
    console.log(`> Ready on http://localhost:${port}`);
  });
});

Thanks so much in advance. 

[EugeneCXY · Accepted solution]

It appears that I was using the server to generate the script tag so when the server is restarting, it needs to be re-authenticated to access the start tag. I am now hosting the script tag in AWS cloudfront CDN