Fix: amend .gitlab-ci.yml file

.gitlab-ci.yml

@@ -2,7 +2,7 @@ stages:
   - lint
   - test
   - build
-	- deploy
+  - deploy
 
 before_script:
   - apt-get update
@@ -68,7 +68,7 @@ unit_test:
 
 build nginx image:
   image: docker:latest
-  stage: building
+  stage: build
   interruptible: true
   except:
     changes:
@@ -87,14 +87,14 @@ build nginx image:
   before_script: []
   script:
     - >
-      docker build
-      --tag $CI_REGISTRY_IMAGE-nginx:latest
-      --build-arg certificate="$CERTIFICATE"
-      --build-arg private_key="$PRIVATE_KEY"
-      --cache-from $CI_REGISTRY_IMAGE-nginx:latest
-      --file nginx/Dockerfile
-      .
-		- docker tag $CI_REGISTRY_IMAGE-nginx:latest $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME-nginx
+        docker build
+        --tag $CI_REGISTRY_IMAGE-nginx:latest
+        --build-arg certificate="$CERTIFICATE"
+        --build-arg private_key="$PRIVATE_KEY"
+        --cache-from $CI_REGISTRY_IMAGE-nginx:latest
+        --file nginx/Dockerfile
+        .
+    - docker tag $CI_REGISTRY_IMAGE-nginx:latest $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME-nginx
     - docker login -u $CI_DEPLOY_USER -p $CI_DEPLOY_PASSWORD $CI_REGISTRY
     - docker push $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME-nginx