json tag 변경

internal/pkg/domain/weather_event.go

@@ -5,13 +5,13 @@ import "time"
 type Celsius float64
 
 type Temperature struct {
-	Value Celsius
+	Value Celsius `json:"value"`
 }
 
 type WeatherEvent struct {
-	Date        time.Time
+	Date        time.Time        `json:"date"`
 	Condition   WeatherCondition `json:"condition"`
-	Temperature *Temperature     `json:"temperature"`
+	Temperature *Temperature     `json:"temperature,omitempty"`
 	High        *Temperature     `json:"high,omitempty"`
 	Low         *Temperature     `json:"low,omitempty"`
 }