08-challenge-shellcode-after: Add Makefile and Dockerfile with multi-stage pattern

chapters/exploitation-techniques/shellcodes/drills/08-challenge-shellcode-after/Dockerfile

@@ -0,0 +1,28 @@
+# syntax=docker/dockerfile:1.4
+#
+# Model: multi-stage build
+#   • build stage: compiles the shellcode exercise
+#   • runtime stage: runs the exe on port 31346
+
+########## Build ##########
+FROM gcc:12 AS builder
+WORKDIR /src
+
+COPY src/ .
+
+RUN make
+
+########## Runtime ##########
+FROM python:3.9-slim
+WORKDIR /app
+
+RUN apt-get update && \	
+    apt-get install -y --no-install-recommends binutils cpp && \
+    pip install pwntools==4.14.1
+
+COPY --from=builder /src/vuln /app/vuln
+COPY sol/ /app/
+
+EXPOSE 31346
+
+CMD ["/bin/sh", "-c", "/app/vuln"]

chapters/exploitation-techniques/shellcodes/drills/08-challenge-shellcode-after/Makefile

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+PORT ?= 31346
+IMG_NAME ?= 08-challenge-shellcode-after
+CONT_NAME ?= $(IMG_NAME)-cnt
+
+build:
+	docker build -t $(IMG_NAME) .
+
+run: build
+	docker run -it -p $(PORT):$(PORT) --name $(CONT_NAME) $(IMG_NAME)
+
+stop:
+	docker stop $(CONT_NAME)
+
+clean: stop
+	docker rm $(CONT_NAME)
+
+.PHONY: build run stop clean