This commit adds blank lines to the end of several files, including pytest.ini, README.md, and various scripts in the viewer-frontend. These changes enhance the readability and maintainability of the codebase by ensuring consistent formatting.
This commit replaces hardcoded sensitive information, such as database passwords and secret keys, in the README and deployment documentation with placeholders and instructions to use environment variables. This change enhances security by preventing exposure of sensitive data in the codebase. Additionally, it updates the database session management to raise an error if the DATABASE_URL environment variable is not set, ensuring proper configuration for development environments.
