Khmer Web: Deploying App to GitHub & Heroku

To deploy any Python application to Heroku platform, we need to create three necessary files - Procfile, requirements.txt, and runtime.txt.

1	`web: python main.py`

The above Procfile is the instuction telling Heroku platform to run the main.py module as the entry point for our application to start.

Next, we need to create a requirements.txt file to instuct Heroku platform to install all required packages and modules installed in our virtual environment using pip installer.

1 2	`myvenv\Scripts\activate` `pip freeze > requirements.txt`

We also need to create a runtime.txt file in which we have to write down the version of Python interpreter needed to run our application.

1	`python-3.8.5`

Lastly, we need to write code for our application able to run offline and also on Heroku platform.

#main.py
import os
from bottle import route, run
    
@route('/')
def main():
    return "Hello World!"
    
if 'DYNO' in os.environ:
  run(host='0.0.0.0', port=os.environ.get('PORT', 9000))
else: 
  run(host='localhost', port=9000, debug=True, reloader=True)

To deploy our application to Heroku platform, we have two choices - deploy it directly to the platform or push it first to GitHub and deploy it later to Heroku platform.

GitHub: https://github.com/Sokhavuth/kwblog
Heroku: https://khmerweb-kwblog.herokuapp.com/