Basic example Flask hello world.

Ensure you have Docker installed in your system.

-First we build the docker-compose.

$ docker-compose build

You should get an output like this:

...
Step 1/5 : FROM python:3.8-slim-buster
3.8-slim-buster: Pulling from library/python
...

...
---> a1c95d6a940f
Successfully built 
Successfully tagged flask-example_web:latest
...

-Second run the server sqlite3 in background, and conect your host at flask-server.

$ docker-compose up -d

You should get an output like this:

Creating flask-example_web_1 ... done

-To run the application, open a terminal and call docker-compose run using the port 8000.

$ docker-compose run web

You should get an output like this:

Starting server
 * Serving Flask app "hello" (lazy loading)
 * Environment: production
   WARNING: This is a development server. Do not use it in a production deployment.
   Use a production WSGI server instead.
 * Debug mode: off
 * Running on http://127.0.0.1:8000/ (Press CTRL+C to quit)

welcome to Flask-example.