Update README.md

Author: loreabad6

README.md

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-# spatial-data-science.github.io
-Spatial Data Science across Languages
+# Spatial Data Science across Languages
+
+The ‘Spatial Data Science across Languages’ (SDSL) workshops provide a space for bridging the 
+communities and establishing cross-language interaction between developers and users.
+SDSL seeks to bring together the communities from the common and emerging programming languages used
+for data science such as R, Python and Julia, to discuss interoperability, methodological developments, 
+and shared challenges such as interfacing upstream libraries (including GDAL, GEOS, and PROJ), packaging
+and distributing software, and managing user and developer communities.
+
+The SDSL workshops aim to identify commonalities and differences between spatial data science languages, 
+to bridge language barriers and to bring the different communities together to discuss, cooperate, and
+synchronise the development efforts. 
+
+## Discord 
+
+SDSL has a Discord server for discussions and communication during the workshops. Please join via https://discord.gg/HJRKEJsmrr.