Revert "Revert "feat: Add kernel signer to sign Fedora kernel with ub…

…lue's ke…"

This reverts commit c48d26b.

.github/workflows/reusable-build.yml

@@ -144,14 +144,18 @@ jobs:
              if [[ "$IS_LATEST_VERSION" == "true" ]] && \
                 [[ "$IS_STABLE_VERSION" == "true" ]]; then
                  BUILD_TAGS+=("testing")
+                 echo "DEFAULT_TAG=testing" >> $GITHUB_ENV
              elif [[ "$IS_GTS_VERSION" == "true" ]]; then
                  BUILD_TAGS+=("gts-testing")
+                 echo "DEFAULT_TAG=gts-testing" >> $GITHUB_ENV
              fi
           elif [[ "$IS_LATEST_VERSION" == "true" ]] && \
                [[ "$IS_STABLE_VERSION" == "true" ]]; then
               BUILD_TAGS+=("latest")
+              echo "DEFAULT_TAG=latest" >> $GITHUB_ENV
           elif [[ "$IS_GTS_VERSION" == "true" ]]; then
               BUILD_TAGS+=("gts")
+              echo "DEFAULT_TAG=gts" >> $GITHUB_ENV
           fi
 
           if [[ "${{ github.event_name }}" == "pull_request" ]]; then
@@ -221,6 +225,16 @@ jobs:
           extra-args: |
             --target=${{ env.TARGET_NAME }}
 
+      - name: Sign kernel
+        uses: ublue-os/kernel-signer@v0.2.2
+        with:
+          image: ${{ steps.build_image.outputs.image }}
+          default-tag: ${{ env.DEFAULT_TAG }}
+          privkey: ${{ secrets.AKMOD_PRIVKEY_20230518 }}
+          pubkey: /etc/pki/akmods/certs/akmods-ublue.der
+          tags: ${{ steps.build_image.outputs.tags }}
+          strip: false
+
       # Workaround bug where capital letters in your GitHub username make it impossible to push to GHCR.
       # https://github.com/macbre/push-to-ghcr/issues/12
       - name: Lowercase Registry