Add joined stamps, starbucks mobile gift and book count on 257th online meetup

Author: jongfeel

Stamp/README.md

@@ -26,8 +26,9 @@
 
 | Name | 10-04 (255th) | 10-11 (256th) | 10-18 (257th) | 10-25 (258th) | 11-01 (259th) | 11-08 (260th) | 11-15 (261th) | 11-22 (262th) | 11-29 (263th) | 12-06 (264th) | [12-13 (265th)](https://github.com/ThinkAboutSoftware/HomeComingDay/issues/54) | 12-20 (266th) | 12-27 (267th) |
 |-|-|-|-|-|-|-|-|-|-|-|-|-|-|
-| [Kim Jong Feel](https://github.com/jongfeel/) | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/485#issuecomment-3354690077"><img src="approved.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/486#issuecomment-3417653581"><img src="approved.png"/></a> | 
-| [Ahyun Lee](https://github.com/northmantar/) | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/485#issuecomment-3365375011"><img src="approved.png"/>book 5/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/486#issuecomment-3390448143"><img src="approved.png"/>book 6/20</a> | 
+| [Kim Jong Feel](https://github.com/jongfeel/) | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/485#issuecomment-3354690077"><img src="approved.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/486#issuecomment-3417653581"><img src="approved.png"/></a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/487#issuecomment-3417662398"><img src="approved.png"/></a> | 
+| [Ahyun Lee](https://github.com/northmantar/) | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/485#issuecomment-3365375011"><img src="approved.png"/>book 5/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/486#issuecomment-3390448143"><img src="approved.png"/>book 6/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/487#issuecomment-3417564009"><img src="approved.png"/><img src="Starbucks_iceamericano.png"/><img src="approved.png"/>book 7/20</a> | 
+| [Byeongguk Ahn](https://github.com/nonoaa/) | | | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/487#issuecomment-3417760608"><img src="approved.png"/><img src="approved.png"/>book 17/20</a>
 | [Yeshin Lee](https://github.com/yeslee-v/) | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/485#issuecomment-3365649496"><img src="approved.png"/>book 10/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/486#issuecomment-3392740659"><img src="approved.png"/>book 11/20</a> | 
 | [최지윤](https://github.com/chichoon) | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/485#issuecomment-3367729284"><img src="approved.png"/>book 9/20</a> | <a href="https://github.com/ThinkAboutSoftware/OnlineSelfCodingGroup/issues/486#issuecomment-3392719783"><img src="approved.png"/>book 10/20</a> |