fix hadolint error (#9223)

docker/llm/finetune/lora/cpu/docker/Dockerfile

@@ -12,7 +12,7 @@ FROM mpioperator/intel as builder
 ARG http_proxy
 ARG https_proxy
 ENV PIP_NO_CACHE_DIR=false
-ADD ./requirements.txt /bigdl/requirements.txt
+COPY ./requirements.txt /bigdl/requirements.txt
 
 # add public key
 COPY --from=key-getter /root/intel-oneapi-archive-keyring.gpg /usr/share/keyrings/intel-oneapi-archive-keyring.gpg
@@ -56,8 +56,8 @@ RUN mkdir /bigdl/data && mkdir /bigdl/model && \
     echo "    UserKnownHostsFile /dev/null" >> /etc/ssh/ssh_config && \
     sed -i 's/#\(StrictModes \).*/\1no/g' /etc/ssh/sshd_config
 
-ADD ./bigdl-lora-finetuing-entrypoint.sh /bigdl/bigdl-lora-finetuing-entrypoint.sh
-ADD ./lora_finetune.py /bigdl/lora_finetune.py
+COPY ./bigdl-lora-finetuing-entrypoint.sh /bigdl/bigdl-lora-finetuing-entrypoint.sh
+COPY ./lora_finetune.py /bigdl/lora_finetune.py
 
 RUN chown -R mpiuser /bigdl
 USER mpiuser

docker/llm/finetune/qlora/xpu/docker/Dockerfile

@@ -35,4 +35,4 @@ RUN curl -fsSL https://apt.repos.intel.com/intel-gpg-keys/GPG-PUB-KEY-INTEL-SW-P
     pip install peft==0.5.0 datasets && \
     wget https://raw.githubusercontent.com/intel-analytics/BigDL/main/python/llm/example/GPU/QLoRA-FineTuning/qlora_finetuning.py
 
-ADD ./start-qlora-finetuning-on-xpu.sh /start-qlora-finetuning-on-xpu.sh
+COPY ./start-qlora-finetuning-on-xpu.sh /start-qlora-finetuning-on-xpu.sh

docker/llm/inference/cpu/docker/Dockerfile

@@ -6,7 +6,7 @@ ARG PIP_NO_CACHE_DIR=false
 
 ENV PYTHONUNBUFFERED=1
 
-ADD ./start-notebook.sh /llm/start-notebook.sh
+COPY ./start-notebook.sh /llm/start-notebook.sh
 
 # Install PYTHON 3.9
 RUN env DEBIAN_FRONTEND=noninteractive apt-get update && \

docker/llm/serving/cpu/docker/Dockerfile

@@ -7,8 +7,8 @@ ARG TINI_VERSION=v0.18.0
 # Disable pip's cache behavior
 ARG PIP_NO_CACHE_DIR=false
 
-ADD ./entrypoint.sh /opt/entrypoint.sh
-ADD https://github.com/krallin/tini/releases/download/${TINI_VERSION}/tini /sbin/tini
+COPY ./entrypoint.sh /opt/entrypoint.sh
+COPY https://github.com/krallin/tini/releases/download/${TINI_VERSION}/tini /sbin/tini
 # Install Serving Dependencies
 RUN mkdir /llm && \
     cd /llm && \