setting the social img for twitter/open-graph

config.toml

@@ -19,7 +19,7 @@ googleAnalytics = "UA-37717223-7"
     title = "DevFest Toulouse 2019"
     date = "2019-10-03"
     description = "The DevFest, or 'Developers Festival', is a technical conference for developers. It is aimed at students, professionals or simply curious technophiles."
-    images = ["/images/logo.svg", "/images/logo-monochrome.svg"]
+    images = ["/images/social-share.jpg"]
     email = "contact@devfesttoulouse.fr"
     keywords = "event, gdg, gde, devfest, google, programming, android, chrome, developers, web, cloud, androiddev"
     copyright = "We :heart:️ chocolatines"