implement atlas for db migration

services/database.go

@@ -32,26 +32,6 @@ func NewDatabaseService(db *sql.DB) *DatabaseService {
 	return &DatabaseService{db: db}
 }
 
-func (s *DatabaseService) CreateTable() error {
-	_, err := s.db.Exec(`
-		CREATE TABLE IF NOT EXISTS weather_readings (
-			id SERIAL PRIMARY KEY,
-			city TEXT NOT NULL,
-			temp DOUBLE PRECISION NOT NULL,
-			feels_like DOUBLE PRECISION NOT NULL,
-			humidity INTEGER NOT NULL,
-			conditions TEXT NOT NULL,
-			fetched_at TIMESTAMP WITH TIME ZONE NOT NULL
-		)
-	`)
-
-	if err != nil {
-		log.Printf("failed to create table: %v", err)
-	}
-	fmt.Println("weather_readings table ready")
-	return nil
-}
-
 func (s *DatabaseService) SaveReading(weather models.WeatherResponse) (int, error) {
 	conditions := ""
 	if len(weather.Weather) > 0 {