Add development environment setup with Docker and VS Code Dev Containers

contrib/docker/devcontainer/Makefile

@@ -0,0 +1,36 @@
+# Development container management
+
+.PHONY: dev-build dev-run dev-shell dev-stop dev-clean
+
+# Build development container
+dev-build:
+	docker build -f Dockerfile -t yggdrasil-dev .
+
+# Run development container with volume mounts
+dev-run:
+	docker run -it --rm \
+		--name yggdrasil-dev \
+		-v $(PWD):/workspace \
+		-v ~/.gitconfig:/home/vscode/.gitconfig:ro \
+		-p 9001:9001 \
+		-p 9002:9002 \
+		-p 9003:9003 \
+		--privileged \
+		--cap-add=NET_ADMIN \
+		yggdrasil-dev
+
+# Get shell access to running container
+dev-shell:
+	docker exec -it yggdrasil-dev /bin/zsh
+
+# Stop development container
+dev-stop:
+	docker stop yggdrasil-dev || true
+
+# Clean development artifacts
+dev-clean:
+	docker rmi yggdrasil-dev || true
+	docker system prune -f
+
+# Build and run in one command
+dev: dev-build dev-run