To optimize Docker image size.

.github/workflows/push_image.yml

@@ -13,14 +13,6 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v4
 
-      - name: Set up Go
-        uses: actions/setup-go@v5
-        with:
-          go-version: ">=1.22.5"
-
-      - name: Build certimate
-        run: go build -o certimate
-
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3