Containerizing a simple python flask app using docker
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containerizing a simple python flask application using docker is a great way to ensure that your application runs consistently across different environments. this tutorial will guide you through the process step-by-step.
prerequisites
1. **docker**: ensure you have docker installed on your machine. you can download docker from [docker.com](https://www.docker.com/get-started).
2. **basic knowledge of flask**: you should be familiar with creating a simple flask application.
3. **basic knowledge of command-line interface (cli)**.
step 1: create a simple flask application
first, let's create a simple flask application. create a new directory for your project:
next, create a file called `app.py` and add the following code:
step 2: create a requirements file
create a file named `requirements.txt` to specify the dependencies for your flask application. add the following line to it:
step 3: create a dockerfile
now, we need to create a `dockerfile` that will contain the instructions for building our docker image. create a file named `dockerfile` (without any extension) in the same directory and add the following content:
step 4: build the docker image
now that you have your `dockerfile`, you can build your docker image. open your terminal, navigate to the directory where you created your files, and run the following command:
this command builds the docker image and tags it as `flask-docker-example`.
step 5: run the docker container
once the image is built, you can run the container using the following command:
this command maps port 5000 of your host machine to port 5000 of the docker container, allowing you to access the flask app from your web browser.
step 6: access the flask application
open your web browser and navigate to `http://localhost:5000`. you should see the message:
step 7: stopping the docker container
to stop the running docker container, you can press `ctrl + c` in the terminal where the contai ...
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