Add docker internal server check script ( #2092 )
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* add environment variables add checkpoint.sh file to docker image
1. add `POSTGRESQL_DATABASE` environment variable
2. add `DOLPHINSCHEDULER_DATA_BASEDIR_PATH` environment variable
3. add `DOLPHINSCHEDULER_DATA_DOWNLOAD_BASEDIR_PATH` environment variable
4. add `DOLPHINSCHEDULER_PROCESS_EXEC_BASEPATH` environment variable
5. add checkpoint.sh file to check server process
6. modify `README.md` and `README_zh_CN.md`
* add environment variables add checkpoint.sh file to docker image
1. add `POSTGRESQL_DATABASE` environment variable
2. add `DOLPHINSCHEDULER_DATA_BASEDIR_PATH` environment variable
3. add `DOLPHINSCHEDULER_DATA_DOWNLOAD_BASEDIR_PATH` environment variable
4. add `DOLPHINSCHEDULER_PROCESS_EXEC_BASEPATH` environment variable
5. add checkpoint.sh file to check server process
6. modify `README.md` and `README_zh_CN.md`
* add logger port and modify dolphinscheduler_env to dolphinscheduler_env.sh