feat: add vehicle and hydrogen heatmaps

src/server/heatmap-db.ts

@@ -0,0 +1,29 @@
+import dotenv from 'dotenv';
+import pg from 'pg';
+
+dotenv.config();
+
+const { Pool } = pg;
+
+const heatmapPool = new Pool({
+  host: process.env.HEATMAP_DB_HOST,
+  port: Number(process.env.HEATMAP_DB_PORT) || 5432,
+  user: process.env.HEATMAP_DB_USER,
+  password: process.env.HEATMAP_DB_PASSWORD,
+  database: process.env.HEATMAP_DB_NAME,
+  ssl: process.env.HEATMAP_DB_SSL === 'true'
+    ? { rejectUnauthorized: false }
+    : false,
+  max: 5,
+  idleTimeoutMillis: 30_000,
+  connectionTimeoutMillis: 10_000,
+  statement_timeout: 30_000,
+  application_name: 'ln-bi-vehicle-heatmap',
+  options: '-c timezone=Asia/Shanghai -c default_transaction_read_only=on',
+});
+
+heatmapPool.on('error', (error) => {
+  console.error('[vehicle-heatmap] idle PostgreSQL client error:', error);
+});
+
+export default heatmapPool;