Add processing pipeline on image upload

main.go

@@ -103,11 +103,20 @@ func UploadHandler(w http.ResponseWriter, r *http.Request, pipes []pipelines.IPi
 		return
 	}
 
+	// execute pipeline
+	output, err := execPipe.Run("source.jpg", bucket, storageProvider)
+	if err != nil {
+		writeError(w, http.StatusInternalServerError, "error executing pipeline")
+		return
+	}
+
 	w.Header().Set("Content-Type", "application/json")
 
 	err = json.NewEncoder(w).Encode(struct {
-		Message string `json:"message"`
-	}{"ok"})
+		Message     string   `json:"message"`
+		OutputFiles []string `json:"output_files"`
+	}{"ok", []string{output}})
+
 	if err != nil {
 		w.WriteHeader(http.StatusInternalServerError)
 	}