Set Slack webhook for lighthouse results

.github/workflows/accessibility_tests.yml

@@ -163,14 +163,30 @@ jobs:
         uses: ./.github/actions/prepare-app-env
         with:
           skip-ruby: true
+
+      - name: Configure AWS credentials
+        uses: aws-actions/configure-aws-credentials@v4
+        with:
+          aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
+          aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+          aws-region: eu-west-2
+          role-to-assume: Deployments
+          role-duration-seconds: 3600
+          role-skip-session-tagging: true
+
+      - name: Get secrets from AWS ParameterStore
+        uses: dkershner6/aws-ssm-getparameters-action@v2
+        with:
+          parameterPairs: "/teaching-vacancies/github_action/infra/slack_webhook = SLACK_WEBHOOK"
+
       - name: Set lighthouse config values
         run: |
           encoded_auth=$(echo -n $HTTP_BASIC_USER:$HTTP_BASIC_PASSWORD | base64)
           sed -i "s/auth_token/${encoded_auth}/g" .lighthouserc.json
 
       - name: Set environment variables for testing URLs
         run: |
-          echo "INDEX_URL=https://qa.teaching-vacancies.service.gov.uk" >> $GITHUB_ENV
+          echo "INDEX_URL=https://qa.teaching-vacancies.service.gov.uk/" >> $GITHUB_ENV
           echo "JOBS_URL=https://qa.teaching-vacancies.service.gov.uk/jobs" >> $GITHUB_ENV
           echo "SCHOOLS_URL=https://qa.teaching-vacancies.service.gov.uk/schools" >> $GITHUB_ENV
 
@@ -188,7 +204,7 @@ jobs:
 
       - name: Set environment variables for test results
         run: |
-          echo "INDEX_RESULTS=$(${{steps.LHCIAction.outputs.links}} | jq '.["$INDEX_URL"]')" >> $GITHUB_ENV
+          echo "INDEX_RESULTS=$(echo '${{steps.LHCIAction.outputs.links}}' | jq '.["$INDEX_URL"]')" >> $GITHUB_ENV
 
       - name: Notify twd_tv_dev channel on Lighthouse results
         uses: rtCamp/[email protected]