diff --git a/Docs/Docker-Images.png b/Docs/Docker-Images.png
new file mode 100644
index 00000000..844ab33a
Binary files /dev/null and b/Docs/Docker-Images.png differ
diff --git a/Docs/Docker-Running.png b/Docs/Docker-Running.png
new file mode 100644
index 00000000..7c87ec3e
Binary files /dev/null and b/Docs/Docker-Running.png differ
diff --git a/Docs/Home-Java-Maven.png b/Docs/Home-Java-Maven.png
new file mode 100644
index 00000000..5fbe65f8
Binary files /dev/null and b/Docs/Home-Java-Maven.png differ
diff --git a/Docs/Jenkins-Docker.png b/Docs/Jenkins-Docker.png
new file mode 100644
index 00000000..45832124
Binary files /dev/null and b/Docs/Jenkins-Docker.png differ
diff --git a/Docs/Jenkins-Git.png b/Docs/Jenkins-Git.png
new file mode 100644
index 00000000..0b090eb4
Binary files /dev/null and b/Docs/Jenkins-Git.png differ
diff --git a/Docs/Jenkins-JDK21.png b/Docs/Jenkins-JDK21.png
new file mode 100644
index 00000000..ea10d972
Binary files /dev/null and b/Docs/Jenkins-JDK21.png differ
diff --git a/Docs/Jenkins-Login.png b/Docs/Jenkins-Login.png
new file mode 100644
index 00000000..dcfe3e83
Binary files /dev/null and b/Docs/Jenkins-Login.png differ
diff --git a/Docs/Jenkins-Maven.png b/Docs/Jenkins-Maven.png
new file mode 100644
index 00000000..b16eee2e
Binary files /dev/null and b/Docs/Jenkins-Maven.png differ
diff --git a/Docs/PRA05-Explanation.md b/Docs/PRA05-Explanation.md
new file mode 100644
index 00000000..047e5ff7
--- /dev/null
+++ b/Docs/PRA05-Explanation.md
@@ -0,0 +1,88 @@
+# MF05-PRA05: Jenkins CI/CD Pipeline for Spring Boot Application
+## Explanation step by step
+
+- ## Downloading the jenkins/jenkins image: 
+
+![alt text](Docker-Images.png)
+
+- ## Docker with Jenkins running.
+
+![alt text](Docker-Running.png)
+
+- ## Login in Jenkins
+
+![alt text](Jenkins-Login.png)
+
+- ## Logs from Jenkins
+
+```bash
+albertemb@albertemb-VirtualBox:~$ sudo docker logs jenkins
+Running from: /usr/share/jenkins/jenkins.war
+webroot: /var/jenkins_home/war
+2024-12-11 16:37:52.943+0000 [id=1]	INFO	winstone.Logger#logInternal: Beginning extraction from war file
+2024-12-11 16:37:53.019+0000 [id=1]	WARNING	o.e.j.ee9.nested.ContextHandler#setContextPath: Empty contextPath
+2024-12-11 16:37:53.061+0000 [id=1]	INFO	org.eclipse.jetty.server.Server#doStart: jetty-12.0.13; built: 2024-09-03T03:04:05.240Z; git: 816018a420329c1cacd4116799cda8c8c60a57cd; jvm 17.0.13+11
+2024-12-11 16:37:53.570+0000 [id=1]	INFO	o.e.j.e.w.StandardDescriptorProcessor#visitServlet: NO JSP Support for /, did not find org.eclipse.jetty.ee9.jsp.JettyJspServlet
+2024-12-11 16:37:53.625+0000 [id=1]	INFO	o.e.j.s.DefaultSessionIdManager#doStart: Session workerName=node0
+2024-12-11 16:37:54.176+0000 [id=1]	INFO	hudson.WebAppMain#contextInitialized: Jenkins home directory: /var/jenkins_home found at: EnvVars.masterEnvVars.get("JENKINS_HOME")
+2024-12-11 16:37:54.378+0000 [id=1]	INFO	o.e.j.s.handler.ContextHandler#doStart: Started oeje9n.ContextHandler$CoreContextHandler@75f2099{Jenkins v2.479.2,/,b=file:///var/jenkins_home/war/,a=AVAILABLE,h=oeje9n.ContextHandler$CoreContextHandler$CoreToNestedHandler@1c12f3ee{STARTED}}
+2024-12-11 16:37:54.387+0000 [id=1]	INFO	o.e.j.server.AbstractConnector#doStart: Started ServerConnector@4b1abd11{HTTP/1.1, (http/1.1)}{0.0.0.0:8080}
+2024-12-11 16:37:54.401+0000 [id=1]	INFO	org.eclipse.jetty.server.Server#doStart: Started oejs.Server@428640fa{STARTING}[12.0.13,sto=0] @2057ms
+2024-12-11 16:37:54.402+0000 [id=24]	INFO	winstone.Logger#logInternal: Winstone Servlet Engine running: controlPort=disabled
+2024-12-11 16:37:54.679+0000 [id=31]	INFO	jenkins.InitReactorRunner$1#onAttained: Started initialization
+2024-12-11 16:37:55.143+0000 [id=29]	INFO	jenkins.InitReactorRunner$1#onAttained: Listed all plugins
+2024-12-11 16:37:59.874+0000 [id=32]	INFO	jenkins.InitReactorRunner$1#onAttained: Prepared all plugins
+2024-12-11 16:37:59.930+0000 [id=31]	INFO	jenkins.InitReactorRunner$1#onAttained: Started all plugins
+2024-12-11 16:38:00.031+0000 [id=29]	INFO	jenkins.InitReactorRunner$1#onAttained: Augmented all extensions
+2024-12-11 16:38:00.309+0000 [id=30]	INFO	h.p.b.g.GlobalTimeOutConfiguration#load: global timeout not set
+2024-12-11 16:38:01.434+0000 [id=32]	INFO	jenkins.InitReactorRunner$1#onAttained: System config loaded
+2024-12-11 16:38:01.439+0000 [id=32]	INFO	jenkins.InitReactorRunner$1#onAttained: System config adapted
+2024-12-11 16:38:01.711+0000 [id=30]	INFO	jenkins.InitReactorRunner$1#onAttained: Loaded all jobs
+2024-12-11 16:38:01.717+0000 [id=30]	INFO	jenkins.InitReactorRunner$1#onAttained: Configuration for all jobs updated
+2024-12-11 16:38:01.742+0000 [id=46]	INFO	hudson.util.Retrier#start: Attempt #1 to do the action check updates server
+2024-12-11 16:38:01.766+0000 [id=31]	INFO	jenkins.InitReactorRunner$1#onAttained: Completed initialization
+2024-12-11 16:38:01.866+0000 [id=23]	INFO	hudson.lifecycle.Lifecycle#onReady: Jenkins is fully up and running
+2024-12-11 16:38:06.223+0000 [id=46]	INFO	h.m.DownloadService$Downloadable#load: Obtained the updated data file for hudson.tasks.Maven.MavenInstaller
+2024-12-11 16:38:06.966+0000 [id=46]	INFO	h.m.DownloadService$Downloadable#load: Obtained the updated data file for hudson.tasks.Ant.AntInstaller
+2024-12-11 16:38:07.719+0000 [id=46]	INFO	h.m.DownloadService$Downloadable#load: Obtained the updated data file for hudson.plugins.gradle.GradleInstaller
+2024-12-11 16:38:08.556+0000 [id=46]	INFO	h.m.DownloadService$Downloadable#load: Obtained the updated data file for hudson.plugins.sonar.MsBuildSonarQubeRunnerInstaller
+2024-12-11 16:38:09.316+0000 [id=46]	INFO	h.m.DownloadService$Downloadable#load: Obtained the updated data file for hudson.plugins.sonar.SonarRunnerInstaller
+2024-12-11 16:38:10.180+0000 [id=46]	INFO	h.m.DownloadService$Downloadable#load: Obtained the updated data file for hudson.tools.JDKInstaller
+2024-12-11 16:38:10.188+0000 [id=46]	INFO	hudson.util.Retrier#start: Performed the action check updates server successfully at the attempt #1
+
+```
+## Installing plugins in Jenkins:
+
+- `Recommended plugins` 
+- Maven Integration
+- Git
+- Docker
+- SSH
+- SonarQube Scanner
+
+## Installing Tools in Jenkins:
+
+### Git
+![alt text](Jenkins-Git.png)
+
+### Maven
+![alt text](Jenkins-Maven.png)
+
+### Docker 
+![alt text](Jenkins-Docker.png)
+
+### JDK 21
+![alt text](Jenkins-JDK21.png)
+
+## Error 
+- Because of Maven I cannot build in the next stage.
+![alt text](PipelineError.png)
+
+### Overview
+![alt text](PipelineError-Overview.png)
+
+### Different ways to solve the issue
+- In the Jenkins's bash I installed the same versions of Maven and OpenJDK 21. 
+- Tring to force the OpenJDK version in enviroment area in Groovy file.
+
+![alt text](Home-Java-Maven.png)
\ No newline at end of file
diff --git a/Docs/PipelineError-Overview.png b/Docs/PipelineError-Overview.png
new file mode 100644
index 00000000..f59189f3
Binary files /dev/null and b/Docs/PipelineError-Overview.png differ
diff --git a/Docs/PipelineError.png b/Docs/PipelineError.png
new file mode 100644
index 00000000..8855dbd9
Binary files /dev/null and b/Docs/PipelineError.png differ