chore: add FEDORA_MAJOR_VERSION in CI

.github/workflows/build.yml

@@ -17,6 +17,7 @@ env:
   MY_IMAGE_NAME: "${{ github.event.repository.name }}"  # the name of the image produced by this build, matches repo names
   MY_IMAGE_DESC: "Azure"
   IMAGE_REGISTRY: "ghcr.io/${{ github.repository_owner }}"  # do not edit
+  FEDORA_MAJOR_VERSION: "40"
 
 jobs:
   build_push:
@@ -53,6 +54,7 @@ jobs:
           done
 
           BUILD_TAGS+=("${TIMESTAMP}")
+          BUILD_TAGS+=("${{ env.FEDORA_MAJOR_VERSION }}")
           BUILD_TAGS+=("latest")
 
           if [[ "${{ github.event_name }}" == "pull_request" ]]; then
@@ -96,6 +98,8 @@ jobs:
           # Postfix image name with -custom to make it a little more descriptive
           # Syntax: https://docs.github.com/en/actions/learn-github-actions/expressions#format
           image: ${{ env.MY_IMAGE_NAME }}
+          build-args: |
+            FEDORA_MAJOR_VERSION=${{ env.FEDORA_MAJOR_VERSION }}
           tags: |
             ${{ steps.generate-tags.outputs.alias_tags }}
           labels: ${{ steps.meta.outputs.labels }}