Add build failure notification to concourse pipeline

concourse/pipeline.yml

@@ -1,3 +1,9 @@
+resource_types:
+- name: slack-notification
+  type: docker-image
+  source:
+    repository: cfcommunity/slack-notification-resource
+    tag: latest
 resources:
 - name: docker-git
   type: git
@@ -8,12 +14,16 @@ resources:
     private_key: {{rsa_id}}
     paths:
     - concourse/docker
-- name: sts4-git
+- name: sts4
   type: git
   source:
     uri: git@github.com:spring-projects/sts4.git
     branch: master
     private_key: {{rsa_id}}
+- name: slack-notification
+  type: slack-notification
+  source:
+    url: https://hooks.slack.com/services/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
 - name: docker-image
   type: docker-image
   source:
@@ -34,12 +44,12 @@ jobs:
       skip_download: true
 - name: build-vsix
   plan:
-  - get: sts4-git
+  - get: sts4
     trigger: true
   - task: build-vscode-extensions
     config:
       inputs:
-      - name: sts4-git
+      - name: sts4
       platform: linux
       image_resource:
         type: docker-image
@@ -47,4 +57,10 @@ jobs:
           repository: kdvolder/sts4-build-env
       run:
         path: "./build-all.sh"
-        dir: "sts4-git/vscode-extensions"
+        dir: "sts4/vscode-extensions"
+    on_failure:
+      put: slack-notification
+      params:
+        channel: "@kdvolder"
+        text: | 
+           Concourse ${BUILD_JOB_NAME}/${BUILD_NAME} has failed!