DATABASE_URL - The URL for connecting to the database.SECRET_KEY_BASE - A secret key used for various security purposes in the application. Can be generated with openssl rand -hex 64.FORCE_SSL - Set to true to enforce SSL.HOST - The domain name for your application.SMTP_USERNAME - The username for the SMTP server for sending emails.SMTP_ADDRESS - The address of the SMTP server.SMTP_PORT - The port number for the SMTP server.SMTP_DOMAIN - The domain used in the HELO command.SMTP_PASSWORD - The password for authenticating with the SMTP server.SMTP_AUTHENTICATION - The authentication method for the SMTP server (plain or login).SMTP_FROM - Email address to send emails from.SMTP_ENABLE_STARTTLS_AUTO - Pass false to dissable STARTTLS. Enabled by default.AWS_ACCESS_KEY_ID - The AWS access key ID for S3.AWS_SECRET_ACCESS_KEY - The AWS secret access key for S3.AWS_REGION - The AWS region where the S3 bucket is located.S3_ATTACHMENTS_BUCKET - The name of the S3 bucket for storing attachments.GCS_CREDENTIALS - JSON string containing GCP credentials.GCS_PROJECT - The GCP project ID.GCS_BUCKET - The name of the GCP Storage bucket.AZURE_STORAGE_ACCOUNT_NAME - The name of the Azure Storage account.AZURE_STORAGE_ACCESS_KEY - The access key for the Azure Storage account.AZURE_CONTAINER - The name of the Azure Storage container.