Send proof screenshot of failed test to slack

Change-Id: I43e025203df77057b017131e2bb95e1dfe442d77
diff --git a/package.json b/package.json
index d57dab6..3497170 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,9 @@
   "author": "Marc Kupietz",
   "license": "APACHE-2.0",
   "dependencies": {
+    "@slack/web-api": "^7.3.4",
     "chai": "^5.2.0",
+    "form-data": "^4.0.0",
     "mocha": "^11.7.0",
     "mocha-junit-reporter": "^2.2.1",
     "puppeteer": "^24.10.2",