Persist prayer data to a mounted Docker volume via Express API

Replaces localStorage with a JSON-file backend (server.js). Prayers are
stored in /data/prayers.json, which is mounted as a named Docker volume so
data survives container restarts and rebuilds. React fetches from /api/prayers.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DReRqHxSYuVfCzTzQGD9hZ

server.js

@@ -0,0 +1,62 @@
+const express = require('express');
+const cors = require('cors');
+const fs = require('fs');
+const path = require('path');
+
+const app = express();
+const DATA_DIR = process.env.DATA_DIR || path.join(__dirname, 'data');
+const DATA_FILE = path.join(DATA_DIR, 'prayers.json');
+const PORT = process.env.PORT || 4000;
+
+app.use(cors());
+app.use(express.json());
+app.use(express.static(path.join(__dirname, 'build')));
+
+function readPrayers() {
+  if (!fs.existsSync(DATA_FILE)) return [];
+  try {
+    return JSON.parse(fs.readFileSync(DATA_FILE, 'utf8'));
+  } catch {
+    return [];
+  }
+}
+
+function writePrayers(prayers) {
+  fs.mkdirSync(DATA_DIR, { recursive: true });
+  fs.writeFileSync(DATA_FILE, JSON.stringify(prayers, null, 2));
+}
+
+app.get('/api/prayers', (req, res) => {
+  res.json(readPrayers());
+});
+
+app.post('/api/prayers', (req, res) => {
+  const prayers = readPrayers();
+  const prayer = req.body;
+  prayers.unshift(prayer);
+  writePrayers(prayers);
+  res.status(201).json(prayer);
+});
+
+app.put('/api/prayers/:id', (req, res) => {
+  const prayers = readPrayers();
+  const idx = prayers.findIndex(p => p.id === req.params.id);
+  if (idx === -1) return res.status(404).json({ error: 'Not found' });
+  prayers[idx] = { ...prayers[idx], ...req.body };
+  writePrayers(prayers);
+  res.json(prayers[idx]);
+});
+
+app.delete('/api/prayers/:id', (req, res) => {
+  const prayers = readPrayers();
+  const filtered = prayers.filter(p => p.id !== req.params.id);
+  writePrayers(filtered);
+  res.status(204).end();
+});
+
+// Serve React for all other routes
+app.get('*', (req, res) => {
+  res.sendFile(path.join(__dirname, 'build', 'index.html'));
+});
+
+app.listen(PORT, () => console.log(`Server running on port ${PORT}`));