Add uwsgi dependency for production deployment

Change-Id: I783368049ff48033e1ea5fda556511a019d3a482

README.md

@@ -31,7 +31,13 @@ The service can be run during development with:
 
     .venv/bin/pecan serve --reload config.py
 
-In production, the `--reload` parameter is most likely unnecessary.
+In production, the package should be instead installed using:
+
+    pip install '.[production]'
+
+And the debug option in `config.py` has to be turned off. Service can be started via the uwsgi server, for example (with 4 processes):
+
+    uwsgi --http-socket :5000 --venv /path/to/the/virtualenv --pecan /path/to/config.py -p 4
 
 To test the service, generate the certificate request and submit it using curl:
 

setup.py

@@ -19,6 +19,7 @@ setup(
         'auth_ldap': ['python-ldap'],
         'auth_keystone': ['requests'],
         'develop': ['watchdog'],
+        'production': ['uwsgi'],
     },
     setup_requires=[
         'setuptools>=1.0',