Make deploy to work only on master

.github/workflows/pipeline.yml

@@ -32,10 +32,11 @@ jobs:
           start: npm run start-test
           wait-on: http://localhost:5000
       - name: Deploy to Heroku
+        if: ${{ github.event_name == 'push' }}
         uses: akhileshns/heroku-deploy@v3.12.12
         with:
           heroku_api_key: ${{secrets.HEROKU_API_KEY}}
           heroku_app_name: ${{secrets.HEROKU_APP}}
           heroku_email: ${{secrets.HEROKU_API_EMAIL}}
-          healthcheck: "https://${{secrets.HEROKU_APP}}/health"
+          healthcheck: "https://${{secrets.HEROKU_APP}}.herokuapp.com/health"
           rollbackonhealthcheckfailed: true