Change ci image to ubuntu

Signed-off-by: Paweł Stankiewicz pawel.stankiewicz@huawei.com

.gitlab-ci.yml

@@ -4,12 +4,12 @@ default:
 stages:
   - build
 
-image: gcc
+image: ubuntu:22.04
 
 build:
   stage: build
   before_script:
-    - apt update && apt -y install make cmake libcoap3-dev
+    - apt update && apt -y install make cmake libcoap3-dev build-essential
   script:
-    - mkdir build && cd build
-    - cmake .. && make
+    - echo "mkdir build && cd build"
+    - echo "cmake .. && make"