polish(pu): polish dockerfile and its usage instructions

Dockerfile

@@ -8,10 +8,10 @@
 # Before building the Docker image, create a new empty directory, move this Dockerfile into it,
 # and navigate into this directory. This is to avoid sending unnecessary files to the Docker daemon
 # during the build. Then you can then build the Docker image using the following command in your terminal:
-# docker build -t ubuntu-py38-lz .
+# docker build -t ubuntu-py38-lz:latest -f ./Dockerfile .
 
 # To run a container from the image in interactive mode with a Bash shell, you can use:
-# docker run -it --rm ubuntu-py38-lz /bin/bash
+# docker run -dit --rm ubuntu-py38-lz:latest /bin/bash
 
 # Once you're inside the container, you can run the example Python script with:
 # python ./LightZero/zoo/classic_control/cartpole/config/cartpole_muzero_config.py

README.md

@@ -160,11 +160,11 @@ Here's how to use our Dockerfile to build a Docker image, run a container from t
     ```
 3. **Build the Docker image**: Use the following command to build the Docker image. This command should be run from inside the directory that contains the Dockerfile.
     ```bash
-    docker build -t ubuntu-py38-lz .
+    docker build -t ubuntu-py38-lz:latest -f ./Dockerfile .
     ```
 4. **Run a container from the image**: Use the following command to start a container from the image in interactive mode with a Bash shell.
     ```bash
-    docker run -it --rm ubuntu-py38-lz /bin/bash
+    docker run -dit --rm ubuntu-py38-lz:latest /bin/bash
     ```
 5. **Execute LightZero code inside the container**: Once you're inside the container, you can run the example Python script with the following command:
     ```bash

README.zh.md

@@ -150,11 +150,11 @@ pip3 install -e .
     ```
 3. **构建 Docker 镜像**：使用以下命令构建 Docker 镜像。此命令应在包含 Dockerfile 的目录内运行。
     ```bash
-    docker build -t ubuntu-py38-lz .
+    docker build -t ubuntu-py38-lz:latest -f ./Dockerfile .
     ```
 4. **从镜像运行容器**：使用以下命令以交互模式启动一个 Bash shell 的容器。
     ```bash
-    docker run -it --rm ubuntu-py38-lz /bin/bash
+    docker run -dit --rm ubuntu-py38-lz:latest /bin/bash
     ```
 5. **在容器内执行 LightZero 代码**：一旦你在容器内部，你可以使用以下命令运行示例 Python 脚本：
     ```bash