Create maven_installation.md

Author: ravdy

maven/maven_installation.md

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+#  Install & configure Maven build tool on Jenkins
+Maven is a code build tool which used to convert your code to artifact. this is widely used plugin to build in continuous integration
+
+#### Follow this artical in **[YouTube](https://www.youtube.com/watch?v=wgfsVmHnAiM)**
+
+#### Prerequisites
+1. Jenkins server **[Get Help Here](https://www.youtube.com/watch?v=M32O4Yv0ANc)
+
+#### Install Maven on Jenkins
+Download maven packages https://maven.apache.org/download.cgi onto Jenkins server. In this case I am using /opt/maven as my installation directory
+	- Link : https://maven.apache.org/download.cgi
+```sh
+  # Creating maven directory under /opt
+  mkdir /opt/maven
+  cd /opt/maven
+  # downloading maven version 3.6.0
+  wget http://mirrors.fibergrid.in/apache/maven/maven-3/3.6.0/binaries/apache-maven-3.6.0-bin.zip
+  unzip /opt/maven/apache-maven-3.6.0-bin.zip
+ ```
+	
+Setup M2_HOME and M2 paths in .bash_profile of user and add these to path variable
+```sh
+  vi ~/.bash_profile
+  M2_HOME=/opt/maven/apache-maven-3.6.0
+  M2=$M2_HOME/bin
+  PAHT=<Existing_PATH>:$M2_HOME:$M2
+```
+#### Check point 
+logoff and login to check maven version
+Check maven version 
+```sh
+  mvn –version
+```
+So far you have completed installation of maven software to support maven plugin on jenkins console. Let's jump onto jenkins to complete remining steps. 
+
+#### Setup maven on jenkins console
+- Install maven plugin without restart  
+  - `Manage Jenkins` > `Jenkins Plugins` > `available` > `Maven Invoker`
+  
+#### (Update) Install "Maven Integration" Plugin as well
+- Install maven Integration Plugin without restart 
+  - `Manage Jenkins` > `Jenkins Plugins` > `available` > `Maven Integration`
+  
+- Configure java path
+  - `Manage Jenkins` > `Global Tool Configuration` > `Maven`
+
+#### Next Steps
+
+- [x] [Configure Users & Groups in Jenkins](https://youtu.be/jZOqcB32dYM)
+- [x] [Secure your Jenkins Server](https://youtu.be/19FmJumnkDc)
+- [x] [Jenkins Plugin Installation](https://youtu.be/p_PqPBbjaZ4)
+- [x] [Jenkins Master-Slave Configuration](https://youtu.be/hwrYURP4O2k)