Moved database uri to env var

Was is config file.

bot.py

@@ -12,17 +12,10 @@ This bot logs all messages sent in a Telegram Group to a database.
 from __future__ import print_function
 import sys
 from telegram.ext import Updater, CommandHandler, MessageHandler, Filters
-import logging
 import os
 from model import User, Message, session
 from time import strftime
 
-# Enable logging
-logging.basicConfig(format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
-                    level=logging.INFO)
-
-logger = logging.getLogger(__name__)
-
 # Define a few command handlers. These usually take the two arguments bot and
 # update. Error handlers also receive the raised TelegramError object in error.
 
@@ -95,7 +88,8 @@ def add_user(user_id, first_name, last_name, username):
 
 def error(bot, update, error):
     """Log Errors caused by Updates."""
-    logger.warning('Update "%s" caused error "%s"', update, error)
+    print("Update '{}' caused error '{}'".format(update, error), file=sys.stderr)
+
 
 
 def main():

model.py

@@ -1,10 +1,10 @@
 from sqlalchemy import Column, DateTime, String, Integer, ForeignKey, func
 from sqlalchemy.orm import relationship, backref
 from sqlalchemy.ext.declarative import declarative_base
-import ConfigParser
+import os
-config = ConfigParser.ConfigParser()
+
-config.read("config.cnf")
+postgres_url = os.environ["TELEGRAM_BOT_POSTGRES_URL"]
-postgres_url = config.get('postgres', 'postgres_url')
+
 
 '''
 This model has been referenced from: https://www.pythoncentral.io/sqlalchemy-orm-examples/
@@ -14,7 +14,7 @@ Base = declarative_base()
 
 
 class User(Base):
-    __tablename__ = 'users'
+    __tablename__ = 'telegram_users'
     id = Column(Integer, primary_key=True)
     first_name = Column(String)
     last_name = Column(String)
@@ -22,9 +22,9 @@ class User(Base):
 
 
 class Message(Base):
-    __tablename__ = 'messages'
+    __tablename__ = 'telegram_messages'
     id = Column(Integer, primary_key=True)
-    user_id = Column(Integer, ForeignKey('users.id'), nullable=False)
+    user_id = Column(Integer, ForeignKey('telegram_users.id'), nullable=False)
     message = Column(String)
     # Use default=func.now() to set the default hiring time
     # of an Employee to be the current time when an