Add news API functionality and update tests for article retrieval

demos/news_api.py

@@ -0,0 +1,16 @@
+#### FOR ALL FILES OUTSIDE src/ FOLDER ####
+import sys
+import os
+sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), '../src')))
+###########################################
+
+from dotenv import load_dotenv
+from app.news import NewsAPI
+
+def main():
+    api = NewsAPI()
+    print("ok")
+
+if __name__ == "__main__":
+    load_dotenv()
+    main()