add drizzle schema and removed astrodb stuff

src/db/schema.ts

@@ -0,0 +1,8 @@
+import { integer, pgTable, varchar, date, json } from "drizzle-orm/pg-core";
+
+export const usersTable = pgTable("users", {
+  id: integer().primaryKey().generatedAlwaysAsIdentity(),
+  data: date().defaultNow(),
+  location: json(),
+  content: json(),
+});

src/utils/db.ts

@@ -0,0 +1,4 @@
+import 'dotenv/config';
+import { drizzle } from 'drizzle-orm/node-postgres';
+
+const db = drizzle(process.env.DATABASE_URL!);