Fix tags for nightly (#110)

[no ci] fix tags for nightly

.github/workflows/schedule.yml

@@ -91,6 +91,8 @@ jobs:
         uses: docker/metadata-action@master
         with:
           images: ${{ secrets.DOCKERHUB_WORKSPACE }}/${{ env.SERVER_IMAGE_TEST_REPO }}
+          tags:
+            type=raw,value=nightly
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v2
@@ -138,6 +140,8 @@ jobs:
         uses: docker/metadata-action@master
         with:
           images: ${{ secrets.DOCKERHUB_WORKSPACE }}/${{ env.SERVER_IMAGE_TEST_REPO }}
+          tags:
+            type=raw,value=nightly
 
       - name: Login to Docker Hub
         uses: docker/login-action@v2
@@ -208,6 +212,8 @@ jobs:
         uses: docker/metadata-action@master
         with:
           images: ${{ secrets.DOCKERHUB_WORKSPACE }}/${{ env.SERVER_IMAGE_TEST_REPO }}
+          tags:
+            type=raw,value=nightly
 
       - name: Login to Docker Hub
         uses: docker/login-action@v2
@@ -343,6 +349,8 @@ jobs:
         uses: docker/metadata-action@master
         with:
           images: ${{ secrets.DOCKERHUB_WORKSPACE }}/${{ env.SERVER_IMAGE_TEST_REPO }}
+          tags:
+            type=raw,value=nightly
 
       - name: Login to Docker Hub
         uses: docker/login-action@v2