Create README.md

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GraphQL/Sample INC Details GraphQL Code Snippet/README.md

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+Example of incident query for GraphQL API
+The code within this filder is just an example of working and basic implementation of sample incident details schema using GraphQL API in ServiceNow. It consist of:
+
+1. schema (schema.gql)
+2. scripted resolvers (.js extension)
+3. json file representing the resolver mappings (key is Path, value is Resolver)
+This is just an example
+So read it, learn it and explore GraphQL 😊