Initial setup: snakkimo API server with PostgreSQL connection

Node.js/Express API server that connects to PostgreSQL via environment variables.
Includes health check, table listing, row queries, and raw SQL endpoint.
Designed for deployment in Coolify alongside the snakkimo PostgreSQL container.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/index.js

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+require('dotenv').config();
+const express = require('express');
+const cors = require('cors');
+const { pool } = require('./db');
+
+const app = express();
+const PORT = process.env.PORT || 3000;
+
+app.use(cors());
+app.use(express.json());
+
+// Health check
+app.get('/health', async (req, res) => {
+  try {
+    await pool.query('SELECT 1');
+    res.json({ status: 'ok', db: 'connected' });
+  } catch (err) {
+    res.status(503).json({ status: 'error', db: 'disconnected', message: err.message });
+  }
+});
+
+// Routes
+app.use('/api', require('./routes/index'));
+
+// 404
+app.use((req, res) => {
+  res.status(404).json({ error: 'Not found' });
+});
+
+// Error handler
+app.use((err, req, res, next) => {
+  console.error(err.stack);
+  res.status(500).json({ error: 'Internal server error' });
+});
+
+app.listen(PORT, '0.0.0.0', () => {
+  console.log(`snakkimo-API running on port ${PORT}`);
+});