Fix clippy (#254)

* Fix clippy

* Update rust version

Author: Filip-L

Dockerfile

@@ -1,4 +1,4 @@
-FROM rust:1.81 AS builder
+FROM rust:1.85 AS builder
 COPY ./fplus-lib /fplus-lib
 COPY ./fplus-http-server/Cargo.toml /fplus-http-server/Cargo.toml
 COPY ./Cargo.lock /fplus-http-server/Cargo.lock

fplus-lib/src/core/mod.rs

@@ -605,7 +605,7 @@ impl LDNApplication {
                     path,
                 };
 
-                if filter.as_ref().map_or(true, |f| &app_file.id == f) {
+                if filter.as_ref().is_none_or(|f| &app_file.id == f) {
                     apps.push(app_with_date);
                 }
             }