Upload screenshot for runner failures (#72)

test/index.spec.js

@@ -50,6 +50,7 @@ describe("Collection CRUD", () => {
       //       .find('div[class="treeComponent dataResourceTree"]')
       //       .should("contain", dbId);
     } catch (error) {
+      await page.screenshot({path: 'failure.png'});
       trackException(error);
       throw error;
     }