diff --git a/.github/workflows/checks.yml b/.github/workflows/checks.yml
index 6d4f089..ec27e6c 100644
--- a/.github/workflows/checks.yml
+++ b/.github/workflows/checks.yml
@@ -11,8 +11,8 @@ jobs:
     steps:
       - name: SCM Checkout
         uses: actions/checkout@v3
-#        with:
-#          fetch-depth: 0
+        with:
+          fetch-depth: 0
 
       - name: Setup Python & Poetry Environment
         uses: exasol/python-toolbox/.github/actions/python-environment@0.8.0
diff --git a/doc/conf.py b/doc/conf.py
new file mode 100644
index 0000000..e69de29
diff --git a/doc/index.rst b/doc/index.rst
new file mode 100644
index 0000000..e69de29
diff --git a/exasol/python_extension_common/deployment/language_container_deployer.py b/exasol/python_extension_common/deployment/language_container_deployer.py
index 5b4d2fd..a0bf705 100644
--- a/exasol/python_extension_common/deployment/language_container_deployer.py
+++ b/exasol/python_extension_common/deployment/language_container_deployer.py
@@ -1,15 +1,15 @@
 from enum import Enum
 from textwrap import dedent
-from typing import List, Optional
+from typing import List, Optional, Dict
 from pathlib import Path, PurePosixPath
 import logging
 import tempfile
-import requests
+import requests     # type: ignore
 import ssl
-import pyexasol
-from exasol_bucketfs_utils_python.bucketfs_location import BucketFSLocation
-from exasol_bucketfs_utils_python.bucket_config import BucketConfig, BucketFSConfig
-from exasol_bucketfs_utils_python.bucketfs_connection_config import BucketFSConnectionConfig
+import pyexasol     # type: ignore
+from exasol_bucketfs_utils_python.bucketfs_location import BucketFSLocation             # type: ignore
+from exasol_bucketfs_utils_python.bucket_config import BucketConfig, BucketFSConfig     # type: ignore
+from exasol_bucketfs_utils_python.bucketfs_connection_config import BucketFSConnectionConfig    # type: ignore
 
 logger = logging.getLogger(__name__)
 
@@ -40,7 +40,7 @@ def get_websocket_sslopt(use_ssl_cert_validation: bool = True,
     """
 
     # Is server certificate validation required?
-    sslopt: dict[str, object] = {"cert_reqs": ssl.CERT_REQUIRED if use_ssl_cert_validation else ssl.CERT_NONE}
+    sslopt: Dict[str, object] = {"cert_reqs": ssl.CERT_REQUIRED if use_ssl_cert_validation else ssl.CERT_NONE}
 
     # Is a bundle with trusted CAs provided?
     if ssl_trusted_ca:
@@ -66,7 +66,7 @@ def get_websocket_sslopt(use_ssl_cert_validation: bool = True,
 
 
 class LanguageActivationLevel(Enum):
-    f"""
+    """
     Language activation level, i.e.
     ALTER <LanguageActivationLevel> SET SCRIPT_LANGUAGES=...
     """
diff --git a/exasol/python_extension_common/deployment/language_container_deployer_cli.py b/exasol/python_extension_common/deployment/language_container_deployer_cli.py
index 6d68992..f3208ef 100644
--- a/exasol/python_extension_common/deployment/language_container_deployer_cli.py
+++ b/exasol/python_extension_common/deployment/language_container_deployer_cli.py
@@ -6,8 +6,8 @@
 from pathlib import Path
 from exasol.python_extension_common.deployment.language_container_deployer import LanguageContainerDeployer
 
-DB_PASSWORD_ENVIRONMENT_VARIABLE = f"DB_PASSWORD"
-BUCKETFS_PASSWORD_ENVIRONMENT_VARIABLE = f"BUCKETFS_PASSWORD"
+DB_PASSWORD_ENVIRONMENT_VARIABLE = "DB_PASSWORD"
+BUCKETFS_PASSWORD_ENVIRONMENT_VARIABLE = "BUCKETFS_PASSWORD"
 
 
 class CustomizableParameters(Enum):
@@ -54,7 +54,7 @@ def update_parameter(parameter_name: str, formatter: str) -> None:
                 # before and after applying the regex, assuming the current parameter is 'version'.
                 # 'something-with-{version}/tailored-for-{user}' => 'something-with-{version}/tailored-for-{{user}}'
                 # We were looking for all occurrences of a pattern '{some_name}', where some_name is not version.
-                pattern = r'\{(?!' + param.name + r'\})\w+\}'
+                pattern = r'\{(?!' + (param.name or '') + r'\})\w+\}'
                 param_formatter = re.sub(pattern, lambda m: f'{{{m.group(0)}}}', param_formatter)
                 kwargs = {param.name: value}
                 ctx.params[parameter_name] = param_formatter.format(**kwargs)
@@ -126,8 +126,8 @@ def language_container_deployer_main(
         upload_container: bool,
         alter_system: bool,
         allow_override: bool,
-        container_url: str = None,
-        container_name: str = None):
+        container_url: Optional[str] = None,
+        container_name: Optional[str] = None):
 
     deployer = LanguageContainerDeployer.create(
         bucketfs_name=bucketfs_name,
@@ -158,13 +158,3 @@ def language_container_deployer_main(
         # The error message should mention the parameters which the callback is specified for being missed.
         raise ValueError("To upload a language container you should specify either its "
                          "release version or a path of the already downloaded container file.")
-
-
-if __name__ == '__main__':
-    import logging
-
-    logging.basicConfig(
-        format='%(asctime)s - %(module)s  - %(message)s',
-        level=logging.DEBUG)
-
-    language_container_deployer_main()