feat(docker): update .dockerignore for improved file management; enhance Dockerfile with better debugging outputs and verification steps

.dockerignore

@@ -1,65 +1,24 @@
-# Version control
-.git
-.gitignore
-.gitattributes
+# Ignore everything by default
+*
 
-# Python
-__pycache__/
-*.py[cod]
-*$py.class
-*.so
-.Python
-venv/
-env/
-build/
-develop-eggs/
-dist/
-downloads/
-eggs/
-.eggs/
-lib/
-lib64/
-parts/
-sdist/
-var/
-wheels/
-*.egg-info/
-.installed.cfg
-*.egg
-MANIFEST
-
-# IDE
-.idea/
-.vscode/
-*.swp
-*.swo
-.project
-.pydevproject
-.settings/
-*.sublime-workspace
-*.sublime-project
-
-# Test
-.pytest_cache/
-.coverage
-htmlcov/
-.tox/
-.nox/
-coverage.xml
-*.cover
-*.py,cover
-.hypothesis/
-
-# Project specific
-rules_backup/
-.env
-
-# Keep these files
-!src/
+# Explicitly allow required files
 !src/simpleguardhome/
+!src/simpleguardhome/**
 !requirements.txt
 !setup.py
 !pyproject.toml
 !MANIFEST.in
 !LICENSE
-!README.md
+!README.md
+!docker-entrypoint.sh
+
+# Still exclude these even if in allowed directories
+**/__pycache__
+**/*.pyc
+**/*.pyo
+**/*.pyd
+**/.Python
+**/*.so
+**/*.egg
+**/*.egg-info
+**/*.egg-info/