Only create image with latest tag on release (#120)

Signed-off-by: Shmuel Kallner <[email protected]>

Author: shmuelk

.github/actions/docker-build-and-push/action.yml

@@ -32,9 +32,13 @@ runs:
 
     - name: Build image
       run: |
+        if [[ ${{ inputs.prerelease }} ]]; then
+          LATEST_TAG=""
+        else
+          LATEST_TAG="-t ${{ inputs.registry }}/${{ inputs.image-name }}:latest"
+        fi
         docker buildx build \
           --platform linux/amd64,linux/arm64 \
           -t ${{ inputs.registry }}/${{ inputs.image-name }}:${{ inputs.tag }} \
-          -t ${{ inputs.registry }}/${{ inputs.image-name }}:latest \
-          --push .
+          ${LATEST_TAG} --push .
       shell: bash

.github/workflows/ci-release.yaml

@@ -33,6 +33,8 @@ jobs:
           else
             echo "tag=latest" >> "$GITHUB_OUTPUT"
           fi
+          PRE_RELEASE=${{ github.event_name != 'release' || github.event.release.prerelease }}
+          echo "prerelease=${PRE_RELEASE}" >> "$GITHUB_OUTPUT"
         shell: bash
 
       - name: Build and push image
@@ -42,6 +44,7 @@ jobs:
           image-name: ${{ steps.version.outputs.project_name }}
           registry: ghcr.io/llm-d
           github-token: ${{ secrets.GHCR_TOKEN }}
+          prerelease: ${{ steps.tag.outputs.prerelease }}
 
       - name: Run Trivy scan
         uses: ./.github/actions/trivy-scan