Add application file

models.py

@@ -11,6 +11,16 @@ class Database:
             self.conn = psycopg2.connect(os.getenv("POSTGRES_URL"))
             self.cursor = self.conn.cursor()
             # Verify tables exist on startup
+            self.cursor.execute("""
+            CREATE TABLE IF NOT EXISTS messages (
+                id SERIAL PRIMARY KEY,
+                sender VARCHAR(50),
+                body TEXT,
+                created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+            )
+            """)
+            self.conn.commit()
+
             self.cursor.execute("""
                 SELECT EXISTS (
                     SELECT FROM information_schema.tables