clean up some heroku stuff

Author: andrewm4894

.env-example

@@ -1,4 +1,5 @@
 # replace this file with your own .env file.
+PORT=29999
 NETDATAMLAPP_HOSTS=london.my-netdata.io
 NETDATAMLAPP_SCRAPE_CHILDREN=no
 NETDATAMLAPP_LOG_LEVEL=info

Dockerfile

@@ -9,7 +9,4 @@ COPY app.py ./
 COPY index.py ./
 
 ENV PORT=29999
-
-#CMD [ "gunicorn", "--workers=2", "--threads=1", "-b 0.0.0.0:29999", "index:server"]
-
 CMD gunicorn --workers=2 --threads=1 -b 0.0.0.0:$PORT index:server

README.md

@@ -6,6 +6,10 @@ __Netdata ML App__ - A collection of [dash](https://plotly.com/dash/) based pyth
 
 This is all experimental and nowhere near stable yet, but you might find something interesting in your data so why not play around and see :) 
 
+Click below to play with the latest version of the app, deployed to Heroku, configured to use data from our demo servers:
+
+https://netdata-ml-app.herokuapp.com/
+
 ### Apps
 
 Each app focuses on a particular use case: 

index.py

@@ -3,6 +3,9 @@
 import dash_core_components as dcc
 import dash_html_components as html
 from dash.dependencies import Input, Output
+import os
+from dotenv import load_dotenv
+load_dotenv()
 
 from app import app
 from apps import (
@@ -74,4 +77,4 @@ def display_page(pathname):
 
 
 if __name__ == '__main__':
-    app.run_server(port=29999)
+    app.run_server(port=os.getenv('PORT', 29999))