Update README.md

README.md

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 Acesse [https://emanuel-braz.github.io/flutter_sp_social/](https://emanuel-braz.github.io/flutter_sp_social/)
+
+Para adicionar novos QRCodes, crie um novo arquivo `{numero_da_edição_do_meetup}.json` dentro da pasta `data`.
+
+Por exemplo o 16º meetup ficaria `./data/16.json`.
+
+Para visualizar o QRCode criado, acesse o app utilizando a query param `id`. 
+
+Exemplo: https://emanuel-braz.github.io/flutter_sp_social?id=16  
+
+Json de exemplo:
+```json
+{
+    "eventName": "16º Flutter SP",
+    "eventDate": "2019-01-01",
+    "social_qr_codes": [
+        {
+            "title": "Se inscreva no meetup",
+            "qr_code": "https://www.meetup.com/pt-BR/fluttersp/",
+            "icon": "https://upload.wikimedia.org/wikipedia/commons/6/6b/Meetup_Logo.png"
+        },
+    ]
+}
+```