Initial commit: 23 docker stacks for GitOps deployment

Stacks included:
- Infrastructure: traefik, authentik, gitea, registry, watchtower, dockge
- Monitoring: smokeping, changedetection
- Apps: ghost, gollum, wallabag, radicale, invidious, xbackbone, filebrowser, syncthing, zerotier
- Custom: obsidian-tools, memento, perilous, ramz, bookclub, brain

🤖 Generated with Claude Code

stacks/bookclub/server.js

@@ -0,0 +1,51 @@
+const express = require('express');
+const nodemailer = require('nodemailer');
+
+const app = express();
+app.use(express.urlencoded({ extended: true }));
+app.use(express.json());
+
+if (process.env.TRUST_PROXY === 'true') {
+  app.set('trust proxy', true);
+}
+
+const transporter = nodemailer.createTransport({
+  host: process.env.SMTP_HOST,
+  port: parseInt(process.env.SMTP_PORT || '465'),
+  secure: process.env.SMTP_SECURE === 'true',
+  auth: {
+    user: process.env.SMTP_USER,
+    pass: process.env.SMTP_PASS
+  }
+});
+
+app.post('/submit', async (req, res) => {
+  const { secret, ...formData } = req.body;
+
+  if (secret !== process.env.SECRET_PHRASE) {
+    return res.status(403).send('Invalid secret phrase');
+  }
+
+  try {
+    await transporter.sendMail({
+      from: process.env.MAIL_FROM,
+      to: process.env.MAIL_TO,
+      subject: 'New Form Submission',
+      text: Object.entries(formData)
+        .map(([key, value]) => `${key}: ${value}`)
+        .join('\n')
+    });
+
+    res.redirect(process.env.THANK_YOU_URL || '/thanks.html');
+  } catch (error) {
+    console.error('Mail error:', error);
+    res.status(500).send('Failed to send email');
+  }
+});
+
+const port = parseInt(process.env.BIND_PORT || '3000');
+const host = process.env.BIND_HOST || '0.0.0.0';
+
+app.listen(port, host, () => {
+  console.log(`Form mailer listening on ${host}:${port}`);
+});