feat: db connection and migration

server/db/migrate.ts

@@ -0,0 +1,23 @@
+// Idempotent migration runner. Run via `bun run migrate` / on container start.
+import { readFileSync } from "node:fs";
+import { fileURLToPath } from "node:url";
+import { dirname, join } from "node:path";
+import postgres from "postgres";
+
+const url = process.env.DATABASE_URL;
+if (!url) {
+  console.error("DATABASE_URL not set");
+  process.exit(1);
+}
+
+const here = dirname(fileURLToPath(import.meta.url));
+const sql = postgres(url, { max: 1 });
+
+try {
+  const ddl = readFileSync(join(here, "migrations", "0001_init.sql"), "utf8");
+  // Trusted local DDL file, not user input.
+  await sql.unsafe(ddl);
+  console.log("migration 0001_init applied");
+} finally {
+  await sql.end();
+}