Bump base image

Author: Milo123459

src/nixpacks/images.rs

@@ -1,5 +1,5 @@
-pub const DEBIAN_BASE_IMAGE: &str = "ghcr.io/railwayapp/nixpacks:debian-1745885067";
-pub const UBUNTU_BASE_IMAGE: &str = "ghcr.io/railwayapp/nixpacks:ubuntu-1745885067";
+pub const DEBIAN_BASE_IMAGE: &str = "ghcr.io/railwayapp/nixpacks:debian-${STEPS_DATE_OUTPUTS_DATE}";
+pub const UBUNTU_BASE_IMAGE: &str = "ghcr.io/railwayapp/nixpacks:ubuntu-${STEPS_DATE_OUTPUTS_DATE}";
 pub const DEFAULT_BASE_IMAGE: &str = UBUNTU_BASE_IMAGE;
 
 pub const STANDALONE_IMAGE: &str = "ubuntu:noble";