Add GitHub Actions workflow for automated Docker Hub deployment

Co-authored-by: snow-jallen <42281341+snow-jallen@users.noreply.github.com>

README.md

@@ -89,6 +89,29 @@ mermaid charts:
 remember expanded modules as well as scorll position
 
 
+## Automated Docker Hub Deployment
+
+This repository includes a GitHub Actions workflow that automatically builds and deploys Docker images to Docker Hub when code is pushed to the `main` branch.
+
+### Required Secrets
+
+To enable automated deployment, add the following secrets to your GitHub repository:
+
+- `DOCKERHUB_USERNAME`: Your Docker Hub username
+- `DOCKERHUB_TOKEN`: Your Docker Hub access token (not password)
+
+### How it works
+
+The workflow:
+1. Triggers on any push to the `main` branch
+2. Checks out the code
+3. Sets up Docker Buildx
+4. Authenticates to Docker Hub using the provided secrets
+5. Runs the existing `build.sh` script with tag and push flags to build and deploy the image
+
+The deployed image will be available at `alexmickelson/canvas_management` with appropriate version tags.
+
+
 ## Features
 - websocket server to watch file system for changes, notify frontend it should invalidate cache
     - files can be edited in any text editor on the computer and changes are reflected in real time on the site