fix slack component manifest

Author: ptzianos

components/reporters/slack/README.md

@@ -14,17 +14,3 @@ as well as the following:
 | Environment Variable       | Type   | Required | Default | Description                                                             |
 |----------------------------|--------|----------|---------|-------------------------------------------------------------------------|
 | SLACK\_WEBHOOK     | string | yes      | -       | The slack webhook to POST results to|
-
-## How to run
-
-Execute:
-
-```shell
-docker-compose up --build --force-recreate --remove-orphans
-```
-
-Then shutdown with:
-
-```shell
-docker-compose down --rmi all
-```

components/reporters/slack/component.yaml

@@ -4,9 +4,9 @@ type: reporter
 parameters:
   - name: slack_webhook
     type: string
-    value: ""
 steps:
   - name: slack
     image: components/reporters/slack
+    executable: /bin/app
     env_vars:
-      - SLACK_WEBHOOK: {{ .parameters.slack_webhook }}
+      SLACK_WEBHOOK: {{ .parameters.slack_webhook }}