The Container

Let's create a Docker image for our todo application. We start by creating a Dockerfile. Use the following command to create the file:

cat << EOF > $HOME/todo/app/Dockerfile
# Use an official Python runtime as a parent image
FROM python:3.12-slim

# Set the working directory to /app
WORKDIR /app

# Copy the current directory contents into the container at /app
COPY . /app

# Install any needed packages specified in requirements.txt
RUN pip install --no-cache-dir -r requirements.txt

# Make port 5000 available to the world outside this container
EXPOSE 5000

# Run the application
CMD ["python", "app.py"]
EOF

Create a .dockerignore file to exclude unnecessary files from the Docker build context:

cat << EOF > $HOME/todo/app/.dockerignore
.git
.gitignore
__pycache__
venv
tests
Dockerfile
EOF

Install Docker:

# Download the Docker installation script
curl -fsSL https://get.docker.com -o get-docker.sh

# Run the Docker installation script 
# and remove it after installation
sh get-docker.sh && rm get-docker.sh

GitOps the Hard Way, with Argo CD

Build Real GitOps Pipelines From Empty Clusters to Automated Deploys

Enroll now to unlock all content and receive all future updates for free.

Unlock now $20.99 Learn More

Previous Next