Update .gitlab-ci.yml

.gitlab-ci.yml

-hello:
-    image: ubuntu:20.04
-    script:
-        - pwd
-        - whoami
-        - hostname
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+ jenkins:
+    image: jenkins
+    environment: 
+      - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
+    ports: 
+      - "8080:80"
+
+  gitlab:
+    image: gitlab/gitlab-ce:latest
+    ports:
+      - "8000:80"
+      - "8822:22"
+    volumes:
+      - ./config/gitlab:/etc/gitlab
+      - ./data/gitlab:/var/opt/gitlab
+      - ./logs:/var/log/gitlab
+
+  gitlab-runner:
+    image: gitlab/gitlab-runner:latest
+    depends_on: 
+      - gitlab
+    volumes:
+      - ./config/gitlab-runner:/etc/gitlab-runner
+      - /var/run/docker.sock:/var/run/docker.sock
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