OCE-341 Create OCE installation document

Author: mpostelnicu

forms/forms.conf

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+JAVA_OPTS="-Dspring.profiles.active=default -Djava.awt.headless=true -Xmx4096M -Dwicket.configuration=deployment  -Dderby.optimizer.optimizeJoinOrder=false -Dspringfox.documentation.swagger.v2.host=website.url"

installation.md

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+# Installation Document OC-Explorer
+
+## VPS (virtual server) requirements
+
+- CPU: 4 cores
+- Memory: 16GB
+- Disk: 128GB SSD
+
+## Software Prerequisites
+
+- Operating system: Ubuntu Server x64 16.04 LTS or upper
+
+## Install dependencies
+
+### Install MongoDB
+
+Please refer to this comprehensive documentation page about how to install MongoDB on Ubuntu
+https://docs.mongodb.com/v3.0/tutorial/install-mongodb-on-ubuntu/
+
+
+## Install OpenJDK 8.0
+
+`$ sudo apt install openjdk-8-jdk`
+
+## Create user oce
+
+`$ sudo useradd -m oce`
+
+## Option 1 - download and compile source code
+
+### Install Maven
+
+`$ sudo apt install maven`
+
+### Get the source code
+
+
+```
+$ su - oce
+$ git clone https://github.com/devgateway/oc-explorer.git
+```
+
+### Compile the code
+
+```
+$ cd oc-explorer
+$ mvn install
+```
+
+### Copy artifact and config to startup locatinon
+
+```
+$ cd ~
+$ cp forms/target/forms-*-SNAPSHOT.jar oce.jar
+$ cp forms/forms.conf oce.conf
+```
+
+### Edit configuration file
+
+Replace website.url with your website's URL
+
+### Make symlink to enable startup as service
+
+```
+$ sudo ln -s /home/oce/oce.jar /etc/init.d/oce
+$ sudo update-rc.d oce defaults
+```
+