ci: use shell checkout in docker build job

.github/workflows/delivery.yml

@@ -43,8 +43,15 @@ jobs:
     timeout-minutes: 30
 
     steps:
-      - uses: actions/checkout@v4
+      - name: Check out the exact commit
+        shell: sh
+        run: |
+          git init .
+          git remote add origin "$GITHUB_SERVER_URL/$GITHUB_REPOSITORY.git"
+          git fetch --depth 1 origin "$GITHUB_SHA"
+          git checkout --detach FETCH_HEAD
       - name: Log in to the container registry
+        shell: sh
         env:
           REGISTRY_TOKEN: ${{ secrets.REGISTRY_TOKEN }}
         run: |
@@ -52,6 +59,7 @@ jobs:
           printf '%s' "$REGISTRY_TOKEN" |
             docker login "$REGISTRY" --username admin --password-stdin
       - name: Build the cloud image
+        shell: sh
         run: |
           docker build \
             --target yandex \
@@ -61,11 +69,13 @@ jobs:
             --tag "$IMAGE:latest" \
             .
       - name: Push immutable and latest tags
+        shell: sh
         run: |
           docker push "$IMAGE:$GITHUB_SHA"
           docker push "$IMAGE:latest"
       - name: Log out from the container registry
         if: ${{ always() }}
+        shell: sh
         run: docker logout "$REGISTRY" || true
 
   deploy: