Fix DeepSource issues

Author: sanket-deepsource

Dockerfile

@@ -3,15 +3,15 @@ ENV PYTHONPATH /app
 ENV PYTHONUNBUFFERED 1
 ENV PYTHONDONTWRITEBYTECODE 1
 
-ADD . /app
+COPY . /app
 WORKDIR /app
 
-# install curl
-RUN apt-get update
-RUN apt-get install -y curl git
+# install curl; skipcq: DOK-DL3008
+RUN apt-get update && apt-get install -y curl git && apt-get clean && rm -rf /var/lib/apt/lists/*
+SHELL ["/bin/bash", "-o", "pipefail", "-c"]
 
 # download the DeepSource CLI binary
-RUN curl https://deepsource.io/cli | sh
+RUN curl https://deepsource.io/cli | bash
 RUN ["chmod", "777", "/app/main.py"]
 
 CMD ["/app/main.py"]

main.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 import os
-import subprocess
+import subprocess  # skipcq: BAN-B404
 import sys
 
 # input for the actions are converted to names of a specific format by GitHub
@@ -42,6 +42,7 @@ def main() -> None:
     # change the current working directory to the GitHub repository's context
     os.chdir(GITHUB_WORKSPACE_PATH)
 
+    # skipcq: BAN-B603, PYL-W1510
     process = subprocess.run(
         command,
         env=dict(os.environ, DEEPSOURCE_DSN=input_data["dsn"]),