fix(docs) :: remove DSN=DuckDB from the database_url default

[81reap]

create_default_database only ever builds a sqlite:// URL, so this isn't a possible default

SQLPage/src/app_config.rs

Lines 633 to 676 in 109b20d

	fn create_default_database(configuration_directory: &Path) -> String {
	let prefix = "sqlite://".to_owned();
	#[cfg(not(feature = "lambda-web"))]
	{
	let config_dir = cannonicalize_if_possible(configuration_directory);
	let old_default_db_path = PathBuf::from(DEFAULT_DATABASE_FILE);
	let default_db_path = config_dir.join(DEFAULT_DATABASE_FILE);
	if let Ok(true) = old_default_db_path.try_exists() {
	log::warn!(
	"Your sqlite database in {} is publicly accessible through your web server. Please move it to {}.",
	old_default_db_path.display(),
	default_db_path.display()
	);
	return prefix + old_default_db_path.to_str().unwrap();
	} else if let Ok(true) = default_db_path.try_exists() {
	log::debug!(
	"Using the default database file in {}",
	default_db_path.display()
	);
	return prefix + &encode_uri(&default_db_path);
	}
	// Create the default database file if we can
	if let Ok(tmp_file) = std::fs::File::create(&default_db_path) {
	log::info!(
	"No DATABASE_URL provided, {} is writable, creating a new database file.",
	default_db_path.display()
	);
	drop(tmp_file);
	if let Err(e) = std::fs::remove_file(&default_db_path) {
	log::debug!(
	"Unable to remove temporary probe file. It might have already been removed by another instance started concurrently: {e}"
	);
	}
	return prefix + &encode_uri(&default_db_path) + "?mode=rwc";
	}
	}
	log::warn!(
	"No DATABASE_URL provided, and {} is not writeable. Using a temporary in-memory SQLite database. All the data created will be lost when this server shuts down.",
	configuration_directory.display()
	);
	prefix + ":memory:?cache=shared"
	}