Add make devserver target for local Docker development

Makefile

@@ -1,4 +1,4 @@
-.PHONY: check lint test fmt build clean docker docker-test
+.PHONY: check lint test fmt build clean docker docker-test devserver devserver-stop
 
 VERSION := $(shell git describe --tags --always --dirty 2>/dev/null || echo "dev")
 LDFLAGS := -X main.Version=$(VERSION)
@@ -46,3 +46,13 @@ docker:
 docker-test:
 	docker build --target builder --build-arg VERSION=$(VERSION) -t pixad-builder .
 	docker run --rm pixad-builder sh -c "CGO_ENABLED=1 GOTOOLCHAIN=auto go test -v ./..."
+
+# Run local dev server in Docker
+devserver: docker devserver-stop
+	docker run -d --name pixad-dev -p 8080:8080 pixad:latest
+	@echo "pixad running at http://localhost:8080"
+
+# Stop dev server
+devserver-stop:
+	-docker stop pixad-dev 2>/dev/null
+	-docker rm pixad-dev 2>/dev/null