UPD: Improvements to the documentation

README.md

+# NETVS - Middleware
+
+## Installation
+
+The NET-SUITE middleware requires ```python3```.
+
+In case you don't want a venv setup, omit steps 1&2.
+1. Create venv:
+
+   ```shell
+    virtualenv venv/
+    ```
+   
+2. Change into venv:
+
+   ```shell
+    source bin/activate
+    ```
+
+3. Install dependencies:
+
+    ```shell
+    pip install -r requirements.txt
+    ```
+
+## Productive setup with uwsgi
+
+```shell
+uwsgi -s /tmp/net-suite.sock --virtualenv <path to env> --manage-script-name --mount /net-suite=run:app
+```
+
+## DEV-Setup
+
+```DEBUG = True``` in ```config.py```.
+
+```shell
+python3 run.py
+```
+
+## systemd
+
+Also take at look at the [uwsgi documentation](http://uwsgi-docs.readthedocs.io/en/latest/Systemd.html#one-service-per-app-in-systemd).
+
+## Configuration
+### NET-DB
+#### Postgres
+Net-Suite uses different databases depending on the host operation mode defined in ```/usr/local/etc/host_oper_mode_data.cfg```:
+
+```INI
+[op_environment]
+mode = test
+# mode = prod
+# mode = test
+
+[redundancy]
+mode = active
+
+[default_database_connection] 
+prod  = pgsql_prod
+test  = pgsql_test
+devel = psql_devel
+```
+
+The different databases are defined in the ```HOME``` of the user running DNSVS in the file ``` ~/.db_connection_data.ini```:
+
+```INI
+[pgsql_prod]
+host=prodhost
+port=5435
+user=user
+db=db
+    
+[pgsql_test]
+host=testhost
+port=5435
+user=user
+db=db
+    
+[pgsql_devel]
+host=develhost
+port=5435
+user=user
+db=db
+```
+
+Postgres' authentication information is retrieved from ```~/.pgpass```. 
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