#2 - Add more details in README.md file

Author: hendisantika

README.md

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 # JVM-Meetup-21
+Summarize from JVM Meetup #21 "Gojek x JVM: Java in Production Environment"
+
+Hari & Tanggal : Kamis, 15 Agustus 2019
+
+Lokasi : GoJek HQ
+
+Pasaraya Blok M Jakarta, RT.3/RW.1, Melawai, Kec. Kby. Baru, Kota Jakarta Selatan, Daerah Khusus Ibukota Jakarta 12160
+
+Speaker : 
+
+1. Andi Pangeran (Product Engineer, Gojek) : ["Synchronous Journey with gRPC"](https://drive.google.com/open?id=1WS8xvbaG0Yl6l875oDvG-JDpvXQyZFRi)
+
+2. Fitrah Elly Firdaus (Software Engineer, Bukalapak) : "How Do we rewrite Config and Toggle Management System using caffeine and Spring boot."
+ 
+
+![JVM Meetup #21 Poster](img/JVM21_Landscape.jpeg "JVM Meetup #20 Poster")
+
+## JVM MEETUP 21 PHOTO SESSION
+![JVM 21 Photo Session](img/jvm21_photosession1.JPG "JVM 21 Photo Session")
+
+![JVM 21 Photo Session](img/jvm21_photosession2.JPG "JVM 21 Photo Session")
+
+Ayo join JVM User Group di telegram untuk diskusi lebih lanjut.
+
+Join Us : [@JVMUserGroup](https://t.me/JVMUserGroup)
+
+Like & Follow Instagram : [JVM Indonesia](https://www.instagram.com/jvmindonesia/)
+
+Like & Follow : [JVM Developer ID](https://www.facebook.com/JVMDeveloperID/)
+
+Subscribe : [JVM Indonesia](https://www.youtube.com/channel/UCXwXmQEQySqhqAMmys4N56w)