Reverted back to Heroku deployment

.gitlab-ci.yml

 stages:
-  - compile
-  - test
-  - deploy
+    - compile
+    - test
+    - deploy
 
 compile:
-  stage: compile
-  script:
-    - mvn compile
+    stage: compile
+    script:
+      - mvn compile
 
 test:
-  stage: test
-  script:
-    - mvn test
+    stage: test
+    script:
+      - mvn test
 
 deploy:
-  stage: deploy
-  script:
-    - mvn package
-    - export PORT=5000
-    - sudo nohup sh target/bin/simplewebapp &
+    stage: deploy
+    script:
+      - dpl --provider=heroku --app=jlp19-simplewebapp --api-key=$Heroku_API_Key
\ No newline at end of file