diff --git a/jenkins/README.md b/jenkins/README.md
index f53041a..8e2ca81 100644
--- a/jenkins/README.md
+++ b/jenkins/README.md
@@ -3,24 +3,11 @@ jenkins
 
 ![](https://badge.imagelayers.io/jenkinsci/jenkins:latest.svg)
 
-In a nutshell, [Jenkins][1] is the leading open source automation server. Built
-with Java, it provides hundreds of plugins to support building, testing,
-deploying and automation for virtually any project.
+[Jenkins][1] is the leading open source automation server. Built with Java,
+it provides hundreds of plugins to support building, testing, deploying and
+automation for virtually any project.
 
-## docker-compose.yml
-
-```yaml
-jenkins:
-  image: jenkins/jenkins:lts-alpine
-  ports:
-    - "8080:8080"
-    - "50000:50000"
-  volumes:
-    - ./data:/var/jenkins_home
-  environment:
-    - JAVA_OPTS=-Dhudson.footerURL=http://jenkins.easypi.pro
-  restart: always
-```
+Read [more](https://github.com/jenkinsci/docker) about this docker image.
 
 ## up and running
 
@@ -37,18 +24,18 @@ $ docker-compose exec jenkins bash
 ......
 >>> exit
 $ docker-compose exec --user root jenkins apk add -U git
-$ firefox http://localhost:8080/
+$ curl http://localhost:8080/
 ```
 
 ## fix slow network
 
-```
+```bash
 $ vim data/war/jsbundles/pluginSetupWizard.js
     // default 10 seconds for AJAX responses to return before triggering an error condition
     var pluginManagerErrorTimeoutMillis = 10 * 1000;
 ```
 
-> Chinese users may add `-Dhudson.model.DownloadService.noSignatureCheck=true` option to use [plugin update mirror site][2].
+> :cn: Chinese users may add `-Dhudson.model.DownloadService.noSignatureCheck=true` option to use [plugin update mirror site][2].
 
 [1]: https://jenkins.io/index.html
 [2]: https://mirrors.tuna.tsinghua.edu.cn/jenkins/updates/current/update-center.json
diff --git a/jenkins/agent/README.md b/jenkins/agent/README.md
index 45064a2..95d3a7f 100644
--- a/jenkins/agent/README.md
+++ b/jenkins/agent/README.md
@@ -1,6 +1,11 @@
 jenkins/inbound-agent
 =====================
 
+[inbound-agent][1] is for Jenkins agents using TCP or WebSockets to establish
+inbound connection to the Jenkins controller. This agent is powered by the
+Jenkins Remoting library, which version is being taken from the base Docker
+Agent image.
+
 ## how to
 
 - Enable TCP port 50000 for inbound agents: http://jenkins:8080/configureSecurity/
@@ -54,3 +59,5 @@ File: ~/.gitconfig
 [http "https://github.com"]
 	proxy = http://x.x.x.x:8123
 ```
+
+[1]: https://hub.docker.com/r/jenkins/inbound-agent
diff --git a/jenkins/agent/docker-compose.yml b/jenkins/agent/docker-compose.yml
index 615bab4..f44d5f4 100644
--- a/jenkins/agent/docker-compose.yml
+++ b/jenkins/agent/docker-compose.yml
@@ -1,17 +1,16 @@
 version: "3.8"
-
 services:
-
-  inbound-agent:
-    image: jenkins/inbound-agent
+  agent:
+    image: jenkins/inbound-agent:alpine-jdk21
     init: true
     container_name: docker-inbound-agent
     volumes:
       - ./data:/home/jenkins
       - ./data/agent:/home/jenkins/agent
     environment:
-      - JENKINS_URL=http://jenkins.easypi.pro:8080
+      - JENKINS_URL=http://jenkins.easypi.duckdns.org:8080
       - JENKINS_SECRET=***************************
       - JENKINS_AGENT_NAME=docker-inbound-agent
       - JENKINS_AGENT_WORKDIR=/home/jenkins/agent
+      - TZ=Etc/UTC
     restart: unless-stopped
diff --git a/jenkins/arm/Dockerfile b/jenkins/arm/Dockerfile
deleted file mode 100644
index 3195b07..0000000
--- a/jenkins/arm/Dockerfile
+++ /dev/null
@@ -1,34 +0,0 @@
-#
-# Dockerfile for jenkins-arm
-#
-
-FROM arm32v7/alpine:3
-MAINTAINER EasyPi Software Foundation
-
-ENV JENKINS_HOME /var/jenkins_home
-
-RUN set -xe \
-    && apk add --no-cache \
-        bash \
-        coreutils \
-        curl \
-        git \
-        openjdk8 \
-        openssh-client \
-        ttf-dejavu \
-        unzip \
-        zip \
-    && addgroup -g 1000 jenkins \
-    && adduser -h $JENKINS_HOME -u 1000 -G jenkins -s /bin/bash -D jenkins \
-    && mkdir -p /usr/share/jenkins \
-    && cd /usr/share/jenkins \
-    && wget http://mirrors.jenkins-ci.org/war/latest/jenkins.war
-
-VOLUME $JENKINS_HOME
-WORKDIR $JENKINS_HOME
-
-USER jenkins
-
-EXPOSE 8080
-
-CMD ["java", "-Djava.awt.headless=true", "-jar", "/usr/share/jenkins/jenkins.war"]
diff --git a/jenkins/arm/README.md b/jenkins/arm/README.md
deleted file mode 100644
index 32413d3..0000000
--- a/jenkins/arm/README.md
+++ /dev/null
@@ -1,4 +0,0 @@
-jenkins-arm
-===========
-
-WARNING: TOO SLOW, DO NOT USE!
diff --git a/jenkins/arm/docker-compose.yml b/jenkins/arm/docker-compose.yml
deleted file mode 100644
index dcb6adf..0000000
--- a/jenkins/arm/docker-compose.yml
+++ /dev/null
@@ -1,7 +0,0 @@
-jenkins:
-  image: easypi/jenkins-arm
-  ports:
-    - "8080:8080"
-  volumes:
-    - ./data:/var/jenkins_home
-  restart: always
diff --git a/jenkins/docker-compose.yml b/jenkins/docker-compose.yml
index 503bce3..4e8d85c 100644
--- a/jenkins/docker-compose.yml
+++ b/jenkins/docker-compose.yml
@@ -1,10 +1,12 @@
-jenkins:
-  image: jenkins/jenkins:lts-alpine
-  ports:
-    - "8080:8080"
-    - "50000:50000"
-  volumes:
-    - ./data:/var/jenkins_home
-  environment:
-    - JAVA_OPTS=-Dhudson.footerURL=http://jenkins.easypi.pro
-  restart: always
+version: "3.8"
+services:
+  jenkins:
+    image: jenkins/jenkins:lts-alpine-jdk21
+    ports:
+      - "8080:8080"
+      - "50000:50000"
+    volumes:
+      - ./data:/var/jenkins_home
+    environment:
+      - JAVA_OPTS=-Dhudson.footerURL=http://jenkins.easypi.duckdns.org
+    restart: unless-stopped