fixing pip call in the yaml file

.gitlab-ci.yml

@@ -2,9 +2,6 @@ image: docker:latest
 services:
   - docker:dind
 
-before_script:
-  - apk add --no-cache python3
-
 stages:
   - linting
   - deploy
@@ -12,11 +9,14 @@ stages:
 linting:
   stage: linting
   before_script:
+    - apk add --no-cache python3    
     - pip3 install pylint
   script:
     - pylint -E app/*.py
 
 build_and_push_container:
+  before_script:
+    - apk add --no-cache python3    
     - pip3 install -r app/requirements.txt
   stage: deploy
   script: