Simplify config internals (#1489)

Author: Emilgardis

.changes/1489.json

@@ -0,0 +1,4 @@
+{
+    "description": "Simplify config internals",
+    "type": "internal"
+}

src/bin/commands/run.rs

@@ -66,7 +66,7 @@ impl Run {
             let image = match docker::get_image(&config, &target, false) {
                 Ok(i) => i,
                 Err(docker::GetImageError::NoCompatibleImages(..))
-                    if config.dockerfile(&target)?.is_some() =>
+                    if config.dockerfile(&target).is_some() =>
                 {
                     "scratch".into()
                 }