Better treatment of ports

package.json

@@ -43,7 +43,8 @@
       "name": "kill-the-newsletter",
       "script": "lib",
       "env": {
-        "NODE_ENV": "production"
+        "NODE_ENV": "production",
+        "EMAIL_PORT": "25"
       }
     },
     {

src/index.tsx

@@ -62,7 +62,7 @@ export const webServer = express()
       )
     )
   )
-  .listen(8000);
+  .listen(process.env.WEB_PORT ?? 8000);
 
 export const emailServer = new SMTPServer({
   disabledCommands: ["AUTH", "STARTTLS"],
@@ -97,7 +97,7 @@ export const emailServer = new SMTPServer({
       callback(error);
     });
   }
-}).listen(process.env.NODE_ENV === "production" ? 25 : 2525);
+}).listen(process.env.EMAIL_PORT ?? 2525);
 
 function Layout({ children }: { children: React.ReactNode }) {
   return (

src/test.ts

@@ -2,6 +2,7 @@ import { webServer, emailServer } from ".";
 import nodemailer from "nodemailer";
 import axios from "axios";
 import qs from "qs";
+import { AddressInfo } from "net";
 
 test("create feed", async () => {
   const identifier = await createFeed();
@@ -112,8 +113,12 @@ afterAll(() => {
   emailServer.close(() => {});
 });
 
-const webClient = axios.create({ baseURL: "http://localhost:8000" });
+const webClient = axios.create({
-const emailClient = nodemailer.createTransport("smtp://localhost:2525");
+  baseURL: `http://localhost:${(webServer.address() as AddressInfo).port}`
+});
+const emailClient = nodemailer.createTransport(
+  `smtp://localhost:${(emailServer.address() as AddressInfo).port}`
+);
 
 async function createFeed(): Promise<string> {
   return (