fixup! Add file-based config support.

Author: G8XSU

rust/server/src/util/config.rs

@@ -23,13 +23,15 @@ pub(crate) struct PostgreSQLConfig {
 
 impl PostgreSQLConfig {
 	pub(crate) fn to_connection_string(&self) -> String {
-		let username = std::env::var("VSS_POSTGRESQL_USERNAME")
+		let username_env = std::env::var("VSS_POSTGRESQL_USERNAME");
+		let username = username_env.as_ref()
 			.ok()
-			.or_else(|| self.username.clone())
+			.or_else(|| self.username.as_ref())
 			.expect("PostgreSQL database username must be provided in config or env var VSS_POSTGRESQL_USERNAME must be set.");
-		let password = std::env::var("VSS_POSTGRESQL_PASSWORD")
+		let password_env = std::env::var("VSS_POSTGRESQL_PASSWORD");
+		let password = password_env.as_ref()
 			.ok()
-			.or_else(|| self.password.clone())
+			.or_else(|| self.password.as_ref())
 			.expect("PostgreSQL database password must be provided in config or env var VSS_POSTGRESQL_PASSWORD must be set.");
 
 		format!(