use DB_URL from shared

main.py

@@ -6,7 +6,7 @@ from flask_bootstrap import Bootstrap
 from wtforms import SubmitField, StringField, HiddenField, SelectField, IntegerField, TextAreaField, validators
 from flask_wtf import FlaskForm
 from status import st, Status
-from shared import CreateSelect
+from shared import CreateSelect, DB_URL
 import re
 import socket
 
@@ -17,9 +17,6 @@ print( "Running on: {}".format( hostname) )
 app = Flask(__name__)
 ### what is this value? I gather I should change it?
 
-# connection string: pguseraccount, pgpasswd, mara as the host, db port is 55432, dbname
-DB_URL = 'postgresql+psycopg2://pa:for_now_pa@mara.ddp.net:55432/pa'
-
 app.config['SQLALCHEMY_DATABASE_URI'] = DB_URL
 app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
 app.config.from_mapping( SECRET_KEY=b'\xd6\x04\xbdj\xfe\xed$c\x1e@\xad\x0f\x13,@G')