Add README.md

Author: ohler55

README.md

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+# Backend
+
+
+# Notes
+
+Just getting things set up. To play with this simple setup run this from the repo home directory.
+
+```
+$ bin/backend
+```
+
+The open this URL in a browser or with curl.
+
+```
+localhost:7890/graphql?query={languages{label,frameworks{label}}}&indent=2
+```
+
+The data is completely fake, not loaded from the database. Just for testing the GraphQL.