fix error with building docker image

.github/workflows/build-nightly-cron.yaml

@@ -268,7 +268,6 @@ jobs:
           npm run build:release
           ls -l build
           mv build ${{ env.OUTPUT_DIR }}
-          tar -czf spt-server.tgz ${{ env.OUTPUT_DIR }}
         shell: bash
 
       - name: Generate Linux File Name
@@ -290,7 +289,11 @@ jobs:
       # docker
       - name: Move .tgz to docker dir
         run: |
-          mv ${{ env.SOURCECODE_DIR }}/project/spt-server.tgz ${{ env.SOURCECODE_DIR }}/docker/spt-server.tgz
+          cd ${{ env.SOURCECODE_DIR }}/project
+          tar -czf ../docker/spt-server.tgz ${{ env.OUTPUT_DIR }}
+          ls -l ../docker
+        shell: bash
+
       - name: Extract metadata for Docker
         id: meta
         uses: docker/metadata-action@v5