adding screenshots of express server assignment outputs

assignment2_screenshots/PostApi_output_usingCURL.png

assignment2_screenshots/step1_express_server_setup.png

assignment2_screenshots/step2_get_api.png

node_modules/.bin/mime

node_modules/.package-lock.json

node_modules/accepts/HISTORY.md

node_modules/accepts/LICENSE

node_modules/accepts/README.md

node_modules/accepts/index.js

node_modules/accepts/package.json

node_modules/array-flatten/LICENSE

node_modules/array-flatten/README.md

node_modules/array-flatten/array-flatten.js

node_modules/array-flatten/package.json

node_modules/body-parser/HISTORY.md

node_modules/body-parser/LICENSE

node_modules/body-parser/README.md

node_modules/body-parser/SECURITY.md

node_modules/body-parser/index.js

node_modules/body-parser/lib/read.js