Update build-image.yml

.github/workflows/build-image.yml

@@ -8,6 +8,17 @@ jobs:
     runs-on: self-hosted
     steps:
     - uses: actions/checkout@v3
+    - name: Preparation step
+      run: |
+          echo "REPOSITORY_OWNER_LC=${REPOSITORY_OWNER,,}" >> ${GITHUB_ENV}
+      env:
+          REPOSITORY_OWNER: '${{ github.repository_owner }}'
+    - name: Login to GitHub Container Registry
+      uses: docker/login-action@v2
+      with:
+        registry: ghcr.io
+        username: ${{ env.REPOSITORY_OWNER_LC }}
+        password: ${{ secrets.GITHUB_TOKEN }}
     - name: Build the image
       run: docker build --target cli --tag ghcr.io/${{ env.REPOSITORY_OWNER_LC }}/arcan-2-cli-trial:latest .
     - name: Push the image