Add docker image cleanup to clean target

Co-authored-by: Junie <junie@jetbrains.com>

Makefile

@@ -10,6 +10,7 @@
 #   make clean     — remove bin/ and generated artifacts
 #   make dist      — build release tarballs for linux/amd64 and linux/arm64
 #   make docker    — build Docker image tagged mcias:$(VERSION) and mcias:latest
+#   make docker-clean — remove local mcias Docker images
 
 # ---------------------------------------------------------------------------
 # Variables
@@ -98,6 +99,7 @@ install: build
 clean:
 	rm -rf $(BIN_DIR)
 	rm -f $(patsubst %.1,%.1.gz,$(MAN_PAGES))
+	-docker rmi mcias:$(VERSION) mcias:latest 2>/dev/null || true
 
 # ---------------------------------------------------------------------------
 # dist — cross-compiled release tarballs for linux/amd64 and linux/arm64
@@ -134,6 +136,14 @@ dist: man
 docker:
 	docker build -t mcias:$(VERSION) -t mcias:latest .
 
+# ---------------------------------------------------------------------------
+# docker-clean — remove local mcias Docker images
+# ---------------------------------------------------------------------------
+.PHONY: docker-clean
+docker-clean:
+	-docker rmi mcias:$(VERSION) mcias:latest 2>/dev/null || true
+	-docker image prune -f --filter label=org.opencontainers.image.title=mcias 2>/dev/null || true
+
 .PHONY: install-local
 install-local: build
 	cp bin/* $(HOME)/.local/bin/
@@ -153,3 +163,4 @@ help:
 	@echo "  clean     Remove build artifacts"
 	@echo "  dist      Build release tarballs for Linux amd64/arm64"
 	@echo "  docker       Build Docker image mcias:$(VERSION) and mcias:latest"
+	@echo "  docker-clean Remove local mcias Docker images"