[docker] Fixes pytorch-gpu docker build script (#2139)

Author: frankfliu

serving/docker/pytorch-gpu.Dockerfile

@@ -48,10 +48,11 @@ COPY distribution[s]/ ./
 RUN mv *.deb djl-serving_all.deb || true
 
 COPY scripts scripts/
+SHELL ["/bin/bash", "-c"]
 RUN chmod +x /usr/local/bin/dockerd-entrypoint.sh && \
     scripts/install_djl_serving.sh $djl_version && \
     scripts/install_djl_serving.sh $djl_version ${torch_version} && \
-    djl-serving -i ai.djl.onnxruntime:onnxruntime-engine:$djl_version && \
+    djl-serving -i ai.djl.onnxruntime:onnxruntime-engine:${djl_version//[~]/-} && \
     djl-serving -i com.microsoft.onnxruntime:onnxruntime_gpu:$onnx_version && \
     scripts/install_python.sh ${python_version} && \
     scripts/install_s5cmd.sh x64 && \