Add a cli interface to choose a configuration (#163)

- [x] add a cli to the webserver to take env variables into account 
- [x] add a cli to the data processing that takes enviromental variable
as a valid source into account
- [x] rework the cli for the reset sql command
- [x] rework the cli for the copying of sql data from one db to another

tests/utils/mongo/mongo_test.py

@@ -1,30 +1,12 @@
 """Tests for connecting to the mongodb."""
 from unittest.mock import patch
 
+from aki_prj23_transparenzregister.config.config_template import MongoConnection
 from aki_prj23_transparenzregister.utils.mongo.connector import (
-    MongoConnection,
     MongoConnector,
 )
 
 
-def test_get_conn_string_no_credentials() -> None:
-    """Tests the mongo connection string generation."""
-    conn = MongoConnection("localhost", "", 27017, None, None)
-    assert conn.get_conn_string() == "mongodb://localhost:27017"
-
-
-def test_get_conn_string_no_port_but_credentials() -> None:
-    """Tests the mongo connection string generation."""
-    conn = MongoConnection("localhost", "", None, "admin", "password")
-    assert conn.get_conn_string() == "mongodb+srv://admin:password@localhost"
-
-
-def test_get_conn_simple() -> None:
-    """Tests the mongo connection string generation."""
-    conn = MongoConnection("localhost", "", None, None, None)
-    assert conn.get_conn_string() == "mongodb+srv://localhost"
-
-
 def test_mongo_connector() -> None:
     """Tests the MongoConnector."""
     with patch("pymongo.MongoClient") as mock_mongo_client: