Refactor slack deploy notifications with webhooks

.circleci/config.yml

@@ -200,10 +200,6 @@ jobs:
           command: |
             . .venv/bin/activate
             make lambda-migrate
-      # In the event the deployment has failed, alert the dev team
-      - slack/notify:
-          event: fail
-          template: basic_fail_1
           
   code_deploy:
     docker:
@@ -248,12 +244,14 @@ jobs:
             DESIRED_CAPACITY=<<parameters.desired-capacity>> \
             python deploy/update_auto_scaling_group.py
           no_output_timeout: 15m # TODO reduce/discuss what is suitable?
-      # In the event the deployment has failed, alert the dev team
-      - slack/notify:
-          event: fail
-          template: basic_fail_1
-          channel: $SLACK_DEFAULT_CHANNEL
-
+      - run:
+          name: Send failure notification
+          command: |
+            if [ "$CIRCLE_JOB" = "code_deploy" ]; then
+              curl -X POST -H 'Content-type: application/json' --data '{"text":"The job has failed."}' https://hooks.slack.com/services/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
+            fi
+          when: on_fail
+
 
 workflows:
   main: