Add commands for docker install

01_04.md

@@ -0,0 +1,25 @@
+# Learning Jenkins, 01-04: Install Jenkins as a Container
+
+# Prerequisites
+You will need to have [Docker](https://docs.docker.com/get-docker/) installed on your local system.
+
+# Installation
+In a terminal, run the following commands:
+
+```
+docker --version
+
+docker pull jenkins/jenkins:lts
+
+docker run --detach --publish 8080:8080 --volume jenkins_home:/var/jenkins_home --name jenkins jenkins/jenkins:lts
+
+docker exec jenkins cat /var/jenkins_home/secrets/initialAdminPassword
+```
+
+# Using the Initial Admin Password
+Run the following command and copy the output:
+```
+docker exec jenkins cat /var/jenkins_home/secrets/initialAdminPassword
+```
+
+Open a browser to [localhost:8080](http://localhost:8080) and enter the initial admin password.