add rule to not build when tagging

.gitlab-ci.yml

+variables:
+  DOCKER_TLS_CERTDIR: ""
+
 stages:
   - build
   - tag
@@ -7,28 +10,25 @@ build:
   tags:
     - podman
   stage: build
-  variables:
-    DOCKER_TLS_CERTDIR: ""
-    GIT_SUBMODULE_STRATEGY: recursive
   before_script:
     - podman login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
   script:
     - podman build --tag $CI_REGISTRY_IMAGE:latest .
     - podman push $CI_REGISTRY_IMAGE:latest
+  rules:
+    - if: $CI_COMMIT_TAG
+      when: never 
+    - when: always
 
 tag:
   image: quay.io/containers/podman:v4.6.2
   tags:
     - podman
   stage: tag
-  variables:
-    DOCKER_TLS_CERTDIR: ""
-    GIT_SUBMODULE_STRATEGY: recursive
   before_script:
     - podman login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
   script:
-    - podman pull $CI_REGISTRY_IMAGE:latest || true
-    - podman build --cache-from $CI_REGISTRY_IMAGE:latest --tag $CI_REGISTRY_IMAGE:$CI_COMMIT_TAG .
+    - podman build --cache-to $CI_REGISTRY_IMAGE --cache-from $CI_REGISTRY_IMAGE --tag $CI_REGISTRY_IMAGE:$CI_COMMIT_TAG .
     - podman push $CI_REGISTRY_IMAGE:$CI_COMMIT_TAG
   only:
     - tags
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