feat: Dockerfile使用 CMD，gRPC 端口 17888，添加文档

snail-job-server/snail-job-server-starter/Dockerfile

@@ -6,19 +6,22 @@ LABEL app-name="snail-job-server"
 LABEL description="SnailJob is a high performance distributed task scheduler and retry management center"
 
 ENV TZ=Asia/Shanghai LANG=C.UTF-8 LC_ALL=C.UTF-8
-ENV JAVA_OPTS="-Djava.security.egd=file:/dev/./urandom -XX:+HeapDumpOnOutOfMemoryError -XX:+UseZGC"
-ENV PARAMS=""
 
 WORKDIR /snailjob/server
 ADD ./target/snail-job-server-exec.jar app.jar
 
 # 对外暴漏的端口号
 EXPOSE 8080
-EXPOSE 1788
+EXPOSE 17888
 
 # 数据卷, 用于映射日志目录
 VOLUME /snailjob/server/data/log
 
 # https://docs.docker.com/reference/build-checks/json-args-recommended/
-SHELL ["/bin/bash", "-c"]
-ENTRYPOINT java $JAVA_OPTS -jar app.jar $PARAMS
+CMD [ "java", "-Djava.security.egd=file:/dev/./urandom", "-XX:+HeapDumpOnOutOfMemoryError", "-XX:+UseZGC", "-jar", "app.jar" ]
+
+# 自定义运行参数:
+# docker run opensnail/snail-job java -XX:+UseZGC -jar app.jar --server.port=8081
+
+# 使用 env:
+# docker run -e SERVER_PORT=8081 opensnail/snail-job