Update build workflow to create Debian package and adjust release directory

.forgejo/workflows/build.yaml

@@ -25,9 +25,14 @@ jobs:
           cd /tmp/phenix
           mkdir -p /tmp/release
           tar -czf /tmp/release/phenix_${{ github.ref_name }}.tar.gz .
+      - name: Make debian package
+        run: |
+          cargo install cargo-deb
+          cargo deb
+          cp target/debian/*.deb /tmp/release
       - name: Make release
         uses: actions/forgejo-release@v2.6.0
         with:
           direction: upload
-          release-dir: /tmp/phenix
+          release-dir: /tmp/release
           token: ${{ secrets.FORGEJO_TOKEN }}