Add support for container to run site

Author: timsneath

Makefile

@@ -0,0 +1,44 @@
+# Makefile for managing the Swift website with the container app
+
+.PHONY: help build run-build website stop clean
+
+help:
+	@echo "Usage:"
+	@echo "  make build    Build the swift-website-builder container image"
+	@echo "  make run-build  Build the Jekyll website"
+	@echo "  make website  Run the Jekyll development server"
+	@echo "  make stop     Stop the running website container"
+	@echo "  make clean    Stop the container and remove the build output"
+
+# Build the primary container image
+build:
+	container build --tag swift-website-builder --file Dockerfile .
+
+# Run a one-off Jekyll build
+run-build:
+	@mkdir -p ./.output
+	container run --rm \
+	  -v "$(CURDIR)":/srv/jekyll \
+	  -v "$(CURDIR)/.output":/output \
+	  swift-website-builder \
+	  /bin/bash -cl "bundle check && bundle exec jekyll build --source /srv/jekyll --destination /output"
+
+# Run the development web server
+website:
+	@mkdir -p ./.output
+	container run -d --rm --name swift-website \
+	  -p 4000:4000 \
+	  -v "$(CURDIR)":/srv/jekyll \
+	  -v "$(CURDIR)/.output":/output \
+	  swift-website-builder \
+	  /bin/bash -cl "bundle check && bundle exec jekyll serve --source /srv/jekyll --destination /output --host 0.0.0.0 --watch"
+	@echo "Website is running at http://localhost:4000"
+
+# Stop the development server
+stop:
+	container stop swift-website
+
+# Clean up build artifacts
+clean: stop
+	@echo "Removing .output directory..."
+	@rm -rf ./.output

README.md

@@ -48,6 +48,26 @@ npm install
 npm run prettify
 ```
 
+### Running with Apple Container
+
+On macOS 26 and later, you can use the [Apple Container](https://github.com/apple/container) tool to host and run the website.
+
+First install and run `container`:
+
+```shell
+brew install container
+brew services start container
+```
+
+Then build and run the site:
+
+```shell
+make build
+make website
+```
+
+The website will be available at `http://localhost:4000`
+
 ### Running in Docker
 
 First build the site with Docker Compose: