Docker容器中Spring Boot应用启动成功但无法访问问题求助

我使用Spring Boot和Kotlin编写了一个简单的后端应用，本地启动均正常，但部署到Docker容器后无法访问，具体情况如下：

• 通过 ./gradlew bootRun 启动应用后可正常访问
• 通过 java -jar demo.jar 启动应用后可正常访问
• 部署到Docker容器后，docker logs containerID 显示应用启动成功（日志如下），但无法访问应用

2022-11-12 15:50:33.017  INFO 1 --- [           main] com.example.demo.DemoApplicationKt       : Starting DemoApplicationKt using Java 11.0.16 on eeb1dfe09e6a with PID 1 (/Demo-0.0.1.jar started by root in /)
2022-11-12 15:50:33.029  INFO 1 --- [           main] com.example.demo.DemoApplicationKt       : No active profile set, falling back to 1 default profile: "default"
2022-11-12 15:50:34.315  INFO 1 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Multiple Spring Data modules found, entering strict repository configuration mode
2022-11-12 15:50:34.320  INFO 1 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data MongoDB repositories in DEFAULT mode.
2022-11-12 15:50:34.346  INFO 1 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 15 ms. Found 0 MongoDB repository interfaces.
2022-11-12 15:50:35.564  INFO 1 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8000 (http)
2022-11-12 15:50:35.595  INFO 1 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2022-11-12 15:50:35.596  INFO 1 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.68]
2022-11-12 15:50:35.787  INFO 1 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2022-11-12 15:50:35.788  INFO 1 --- [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 2628 ms
2022-11-12 15:50:38.155  WARN 1 --- [           main] o.s.b.a.m.MustacheAutoConfiguration      : Cannot find template location: classpath:/templates/ (please add some templates, check your Mustache configuration, or set spring.mustache.check-template-location=false)
2022-11-12 15:50:38.346  INFO 1 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8000 (http) with context path ''
2022-11-12 15:50:38.412  INFO 1 --- [           main] com.example.demo.DemoApplicationKt       : Started DemoApplicationKt in 6.588 seconds (JVM running for 7.745)

Dockerfile 内容 #

FROM openjdk:11
COPY  /build/libs/demo-0.0.1-SNAPSHOT.jar Demo-0.0.1.jar
EXPOSE 8000
ENTRYPOINT ["java","-jar","/Demo-0.0.1.jar"]

构建镜像和运行容器的命令 #

docker build -t demo .
docker run -dp 8000:8000 demo:latest 

无法定位问题，恳请协助排查。

更新 #

访问localhost时显示：

This site can’t be reached localhost refused to connect.
Try:

Checking the connection
Checking the proxy and the firewall
ERR_CONNECTION_REFUSED

已尝试将 -dp 8000 改为 -d -p 8000，但问题依旧。

内容的提问来源于stack exchange，提问作者lifeodyssey