1-Create-Docker-Image.md

Creating the Docker image for the Uber app

In this step you will create a Docker image to containerize the Uber app.

Create The Docker Image

1. cd into the Docker directory where you will see a Dockerfile and app directory. The app directory is what stores the Python application and the Dockerfile will be used to build the app.

2. Open the Dockerfile

3. Within the Dockerfile, you'll see a few key components

   • The Docker image that's being used is Python. It's using the latest version
   • There's a new directory being created called /build, which is where the Python app will reside
   • The app directory will be copied into the /build directory, along with the requirements.txt file to install all of the Python requirements for the app
   • The app will run as soon as the container gets created and comes up

4. To create the Docker image, you'll run the following command: docker build -t uberapp .

The -t is for the tag (the name) of the Docker image and the . is telling the Docker CLI that the Dockerfile is in the current directory

5. After the Docker image is created, run the following command to confirm the Docker image is on your machine. docker image ls

Run The Docker Image Locally

Now that the Docker image is created, you can run the container locally just to confirm it'll work and not crash.

1. To run the Docker container, run the following command: docker run -tid uberapp

• t stands for a TTY console
• i stands for interactive
• d stands for detach so your terminal isn't directly connected to the Docker container

2. To confirm the Docker container is running, run the following command: docker container ls

You should now see the container running.