add README.md

docker/llm/inference/cpu/docker/README.md

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+## Build/Use BigDL-LLM cpu image
+
+### Build Image
+```bash
+docker build \
+  --build-arg http_proxy=.. \
+  --build-arg https_proxy=.. \
+  --build-arg no_proxy=.. \
+  --rm --no-cache -t intelanalytics/bigdl-llm-cpu:2.4.0-SNAPSHOT .
+```
+
+
+### Use the image for doing cpu inference
+
+
+An example could be:
+```bash
+#/bin/bash
+export DOCKER_IMAGE=intelanalytics/bigdl-llm-cpu:2.4.0-SNAPSHOT
+
+sudo docker run -itd \
+        --net=host \
+        --cpuset-cpus="0-47" \
+        --cpuset-mems="0" \
+        --memory="32G" \
+        --name=CONTAINER_NAME \
+        --shm-size="16g" \
+        $DOCKER_IMAGE
+```
+
+
+After the container is booted, you could get into the container through `docker exec`.
+
+