added hello_world folder with db+pl demonstaration

hello_world/main.py

@@ -0,0 +1,34 @@
+from pymongo import MongoClient
+import datetime
+import os
+from dotenv import load_dotenv
+
+
+load_dotenv('../.env')
+
+
+db_uri = f'mongodb://{os.environ['MONGO_INITDB_ROOT_USERNAME']}:{os.environ['MONGO_INITDB_ROOT_PASSWORD']}@{os.environ['MONGO_DB_HOST']}:{os.environ['MONGO_DB_PORT']}/'
+client = MongoClient(db_uri)
+
+print('Cписок доступных БД по умолчанию:')
+print(client.list_database_names())
+print('')
+
+
+gdwrapper_db = client['gdwrapper_db']
+collection = gdwrapper_db['test_collection']
+collection.insert_one(
+    {
+        'Info': 'This is test data',
+        'Timestamp': datetime.datetime.now(tz=datetime.timezone.utc)
+    }
+)
+
+print('Cписок доступных БД после добавления gdwrapper_db:')
+print(client.list_database_names())
+print('')
+
+
+print('Данные gdwrapper_db из коллекции test_collection:')
+for item in client.get_database('gdwrapper_db').get_collection('test_collection').find():    
+    print(item)