Create Timeline with Reactjs and Contentful

Description

Summary

• Step2 Add sample data constitems=[{title:"May 1940",cardTitle:"Dunkirk",cardSubtitle:"Men of the British Expeditionary Force (BEF) wade out to a destroyer during the evacuation from Dunkirk.
• `},{title:"25 July 1940",cardTitle:"The Battle of Britain",cardSubtitle:`RAF Spitfire pilots scramble for their planes`,cardDetailedText:`After France’s surrender in June 1940, Churchill told the British people, “Hitler knows that he will have to break us in this island or lose the war”.
• The first phase of the battle began on 10 July with Luftwaffe attacks on shipping in the Channel.
• long text Step 4 Update react app In this step first, we need to create client.ts to access Contentful API via contentful npm package.