Help in makefile, fixing clean target

Makefile

@@ -1,3 +1,13 @@
+help:
+	@echo -e "Makefile for beretta\n"
+	@echo "Available targets:"
+	@echo "  build           - Build a server binary"
+	@echo "  run             - Run the project"
+	@echo "  build-container - Build OCI container"
+	@echo "  clean           - Clean up build files"
+	@echo "  help            - Show this help message"
+	@echo -e ""
+
 build:
 	go build -o bin/beretta src/*.go
 
@@ -8,4 +18,4 @@ build-container:
 	podman build -t beretta .
 
 clean:
-	rm beretta
+	rm -rf bin