05-rwslotmachine5: Add Makefile and Dockerfile

chapters/mitigations-and-defensive-strategies/defense-mechanisms/activities/05-rwslotmachine5/sol/Dockerfile

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+# --- Build ---
+FROM gcc:latest AS builder
+
+WORKDIR /app
+
+COPY ./rwslotmachine5.c .
+
+RUN gcc -o rwslotmachine5 rwslotmachine5.c
+
+# --- Runtime ---
+FROM ubuntu:22.04
+
+RUN apt-get update && apt-get install -y libstdc++6 && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+COPY --from=builder /app/rwslotmachine5 .
+
+EXPOSE 31348
+
+CMD ["/app/rwslotmachine5"]

chapters/mitigations-and-defensive-strategies/defense-mechanisms/activities/05-rwslotmachine5/sol/Makefile

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+PORT ?= 31348
+IMG_NAME ?= rwslotmachine5
+CONT_NAME ?= $(IMG_NAME)-cnt
+
+build:
+	docker build -t $(IMG_NAME) -f Dockerfile .
+
+run: build
+	docker run -d -p $(PORT):31348 --name $(CONT_NAME) -t $(IMG_NAME)
+
+stop:
+	-docker stop $(CONT_NAME)
+
+clean: stop
+	docker rm $(CONT_NAME)
+
+.PHONY: build run stop clean