08_docker_hub.md

🐳 IMAGE MANAGEMENT AND DOCKER HUB

Publishing images

All project images are automatically published to your Docker Hub account if CI/CD is configured via GitHub Actions.

📌 Each service has its own name and tag:

• USERNAME/flask-api:latest — backend
• USERNAME/node-frontend:latest — frontend
• USERNAME/nginx-proxy:latest — nginx

Tags can be set manually in sudo docker build or in GitHub Actions. By default — latest.

📥 Downloading images from Docker Hub

If you want to download an image manually:

sudo docker pull USERNAME/flask-api:latest

🗑 Removing images from your local machine

To free up space and remove unnecessary images:

sudo docker rmi USERNAME/flask-api

💡 You can add the -f flag to force removal.

👀Viewing images

Open https://hub.docker.com/u/USERNAME to see:

• all available images;
• tags;
• last update date.

🛠 Manual build and upload (if there is no CI)

You can build and push the image manually:

sudo docker build -t USERNAME/flask-api:latest .
sudo docker login
sudo docker push USERNAME/flask-api:latest

🧪 Errors when pushing/pull

If you see errors:

• 🔐 Make sure you have run sudo docker login
• ✅ Make sure you have permissions to the repository on Docker Hub
• ⚠️ Check the image name and tag: should be USERNAME/imagename[:tag]