Client/GameClient/Assets/Game/Launcher/GameCamera.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class GameCamera : MonoBehaviour
{

    float devWidth = 10.8f;
    // Start is called before the first frame update
    void Start()
    {
        float screenHeight = Screen.height;
        // Debug.Log("screenHeight = " + screenHeight);
        float orthographicSize = this.GetComponent<Camera>().orthographicSize;
        float aspectRatio = Screen.width * 1.0f / Screen.height;
        float cameraWidth = orthographicSize * 2 * aspectRatio;
        // Debug.Log("cameraWidth = " + cameraWidth);
        if (cameraWidth < devWidth)
        {
            orthographicSize = devWidth / (2 * aspectRatio);
            // Debug.Log("new orthographicSize = " + orthographicSize);
            this.GetComponent<Camera>().orthographicSize = orthographicSize;
        }
    }

    // Update is called once per frame
    void Update()
    {

    }
}