make example doc optional for example details

Author: mirkoCrobu

internal/orchestrator/bricks/bricks.go

@@ -154,11 +154,14 @@ func (s *Service) BricksDetails(id string) (BrickDetailsResult, error) {
 	if err != nil {
 		return BrickDetailsResult{}, fmt.Errorf("cannot open code examples for brick %s: %w", id, err)
 	}
-	codeExamples := f.Map(examplePaths, func(p *paths.Path) CodeExample {
-		return CodeExample{
-			Path: p.String(),
-		}
-	})
+	var codeExamples []CodeExample
+	if examplePaths != nil {
+		codeExamples = f.Map(examplePaths, func(p *paths.Path) CodeExample {
+			return CodeExample{
+				Path: p.String(),
+			}
+		})
+	}
 
 	return BrickDetailsResult{
 		ID:           id,

internal/store/store.go

@@ -99,6 +99,9 @@ func (s *StaticStore) GetBrickCodeExamplesPathFromID(brickID string) (paths.Path
 	targetDir := paths.New(s.codeExamplesPath, namespace, brickName)
 	dirEntries, err := targetDir.ReadDir()
 	if err != nil {
+		if errors.Is(err, os.ErrNotExist) {
+			return nil, nil
+		}
 		return nil, fmt.Errorf("cannot read examples directory %q: %w", targetDir, err)
 	}
 	return dirEntries, nil