diff --git a/Dockerfile b/Dockerfile
index e85eed0..767b061 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -12,13 +12,13 @@ COPY . .
 VOLUME /kill-the-newsletter/static/feeds/
 VOLUME /kill-the-newsletter/static/alternate/
 
-ENV WEB_PORT=8000
+ENV WEB_PORT=4000
 ENV EMAIL_PORT=2525
-ENV BASE_URL=http://localhost:8000
+ENV BASE_URL=http://localhost:4000
 ENV EMAIL_DOMAIN=localhost
 ENV ISSUE_REPORT=mailto:kill-the-newsletter@leafac.com
 
-EXPOSE 8000
+EXPOSE 4000
 EXPOSE 2525
 
 CMD npx ts-node .
\ No newline at end of file
diff --git a/package.json b/package.json
index 6c71a1f..2bdc0ea 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,8 @@
     "fs-extra": "^9.1.0",
     "mailparser": "^3.1.0",
     "smtp-server": "^3.8.0",
-    "tagged-template-noop": "^2.1.1"
+    "tagged-template-noop": "^2.1.1",
+    "ts-node": "^9.1.1"
   },
   "devDependencies": {
     "@types/express": "^4.17.11",
@@ -52,7 +53,6 @@
     "nodemailer": "^6.4.18",
     "prettier": "^2.2.1",
     "ts-jest": "^27.0.5",
-    "ts-node": "^9.1.1",
     "typescript": "^4.2.3"
   },
   "jest": {
diff --git a/source/index.ts b/source/index.ts
index cfc3ca9..634597a 100644
--- a/source/index.ts
+++ b/source/index.ts
@@ -19,9 +19,15 @@ export default function killTheNewsletter(
 ): { webApplication: express.Express; emailApplication: SMTPServer } {
   const webApplication = express();
 
-  webApplication.set("url", "http://localhost:4000");
-  webApplication.set("email", "smtp://localhost:2525");
-  webApplication.set("administrator", "mailto:kill-the-newsletter@leafac.com");
+  const baseUrl = process.env.BASE_URL ?? "http://localhost:4000";
+  webApplication.set("url", baseUrl);
+
+  const smtpUrl = process.env.SMTP_URL ?? "smtp://localhost:2525";
+  webApplication.set("email", smtpUrl);
+
+  const issueReportEmail =
+    process.env.ISSUE_REPORT_EMAIL ?? "kill-the-newsletter@leafac.com";
+  webApplication.set("administrator", `mailto:${issueReportEmail}`);
 
   fs.ensureDirSync(rootDirectory);
   const database = new Database(
@@ -503,11 +509,15 @@ if (require.main === module) {
     const { webApplication, emailApplication } = killTheNewsletter(
       path.join(process.cwd(), "data")
     );
-    webApplication.listen(new URL(webApplication.get("url")).port, () => {
-      console.log(`Web server started at ${webApplication.get("url")}`);
+    const webPort =
+      process.env.WEB_PORT ?? new URL(webApplication.get("url")).port;
+    webApplication.listen(webPort, () => {
+      console.log(`Web server started at port ${webPort}}`);
     });
-    emailApplication.listen(new URL(webApplication.get("email")).port, () => {
-      console.log(`Email server started at ${webApplication.get("email")}`);
+    const emailPort =
+      process.env.EMAIL_PORT ?? new URL(webApplication.get("email")).port;
+    emailApplication.listen(emailPort, () => {
+      console.log(`Email server started at port ${emailPort}`);
     });
   } else {
     const configurationFile = path.resolve(process.argv[2]);