Working solution for newer versions of Jenkins

Dockerfile

@@ -1,4 +1,4 @@
-FROM jenkins/jenkins:2.414.2-jdk11
+FROM jenkins/jenkins:2.555.1-lts
 USER root
 RUN apt-get update && apt-get install -y lsb-release python3-pip
 RUN curl -fsSLo /usr/share/keyrings/docker-archive-keyring.asc \

Jenkinsfile

@@ -13,7 +13,7 @@ pipeline {
                 echo "Building.."
                 sh '''
                 cd myapp
-                pip install -r requirements.txt
+                pip install --break-system-packages -r requirements.txt
                 '''
             }
         }

agents/docker-agent-python/Dockerfile

@@ -0,0 +1,5 @@
+FROM jenkins/agent:alpine-jdk21
+USER root
+RUN apk add python3
+RUN apk add py3-pip
+USER jenkins

helloworld.py

@@ -1,2 +1,2 @@
 
-print("Hello world")
+print("Hello world!")

myapp/hello.py

@@ -1,7 +1,9 @@
 import fire
 
+
 def hello(name="World"):
-  return "Hello %s!" % name
+    return "Hello %s!" % name
+
 
 if __name__ == '__main__':
-  fire.Fire(hello)
+    fire.Fire(hello)