Installation.md

-## Prerequirements
-A running installation needs Python3, Nginx (also Apache or other webservers which works as a proxy are possible), Postgresql and Redis.  Other databases have not been tested, so their usage is on your own risk. Furthermore, a Python and Java runtime are required for automatic and programming task evaluation. Also, the sandbox [isolate](https://github.com/ioi/isolate) is required for executing untrusted code. Due isolate you can only use a modern Linux distribution (tested on Debian, Ubuntu and Manjaro) as operating system.
+## Prerequisites
+A running instance of ChiefExam requires **Python3**, **Postgresql**, and **Redis**. Other databases have not been tested, so their usage is at your own risk. Furthermore, a **Python & Java runtime** are required for automatic programming task evaluation. The code execution sandbox **[isolate](https://github.com/ioi/isolate)** is required for executing this untrusted code. Due to isolate, you can only use a modern Linux distribution (tested on Debian, Ubuntu, and Manjaro) as operating system.
+
+It is recommended to use **Nginx** in production to serve static content. Other webservers such as **Apache** which work as a proxy are also feasable.
+
+The commands below are simply an example of how you might install these dependencies. Please consult with your operating system's package manager to determine the correct packages to install.
+
+```
+# Add additional repositories for Redis
+add-apt-repository -y ppa:chris-lea/redis-server
+
+# Update repositories list
+apt update
+
+# Install Dependencies
+apt -y install git build-essential libssl-dev libffi-dev libcap-dev python3-pip python3-dev python3-venv redis-server postgresql postgresql-contrib openjdk-11-jdk
+```
 
 ## Setting up [isolate](https://github.com/ioi/isolate)
 For isolate, you can follow the instruction guides on the website. In short, you have to execute the following commands in your bash:
 ```bash
+cd /tmp
 git clone https://github.com/ioi/isolate.git
 cd isolate
 make isolate
@@ -11,10 +27,8 @@ sudo make install
 ```
 The building needs a modern version `gcc`. Instead of `make isolate` you can also consider to user `make`, which also creates a documentation using `a2x` (this software has then to be installed on your operating system, too).
 
-
-
 ## Setting up flask
-After downloading the application, you should create a virtual environment and install the packets needed for ChiefExam:
+After downloading the application, you need to create a Python virtual environment and install the packages needed for ChiefExam:
 ```bash
 git clone https://gitlab.cs.fau.de/it62ajow/chiefexam.git
 cd chiefexam
@@ -22,14 +36,50 @@ python3 -m venv env
 source env/bin/activate
 pip install -r requirements.txt
 ```
-Now you should create a `.env` file in the root directory of ChiefExam and define the following variables like that:
+
+Now create a `.env` file in the root directory of ChiefExam and define the following variables:
 ```
 DATABASE_URL=...
-REDIS_URL=...
+REDIS_URL=...  (optional)
+JAVA_HOME=...  (optional)
+PYTHON_HOME... (optional)
+SECRET_KEY...
 [...]
 ```
+
+An example `.env` file:
+```
+DATABASE_URL=postgresql+psycopg2://<user>:<password>@<host>/<database>
+JAVA_HOME=/usr/lib/jvm/java-11-openjdk-amd64/
+PYTHON_HOME=/home/<user>/chiefexam/env/
+SECRET_KEY=<some strong key>
+DEBUG=True
+```
+
 - `DATABASE_URL`: Defines the url for the database
 
+## Running ChiefExam
+To start ChiefExam you will need two open bash terminals.
+
+Starting the ChiefExam server is done by using the following commands:
+
+```
+cd chiefexam
+source env/bin/activate
+python server.py
+```
+
+`deactivate` can be used to leave the Python virtual environment.
+
+Starting the celery service worker is achieved by using:
+```
+cd chiefexam
+source env/bin/activate
+celery -A app:celery worker
+```
+
+`--loglevel=INFO` can be added to the start of celery for debugging.
+
 ## Defining systemd workers
 
 ## Setting up proxy