Update my_example.Dockerfile

docker/my_example.Dockerfile

@@ -1,60 +1,6 @@
 # explicitly use Debian for maximum cross-architecture compatibility
-FROM debian:bullseye-slim AS hello-world
+FROM debian:bullseye-slim AS cps-hello-world
 
-RUN set -eux; \
-	apt-get update; \
-	apt-get install -y --no-install-recommends \
-		ca-certificates \
-		gnupg \
-		wget \
-		\
-		gcc \
-		libc6-dev \
-		make \
-		\
-		libc6-dev-arm64-cross \
-		libc6-dev-armel-cross \
-		libc6-dev-armhf-cross \
-		libc6-dev-i386-cross \
-		libc6-dev-mips64el-cross \
-		libc6-dev-ppc64el-cross \
-		libc6-dev-riscv64-cross \
-		libc6-dev-s390x-cross \
-		\
-		gcc-aarch64-linux-gnu \
-		gcc-arm-linux-gnueabi \
-		gcc-arm-linux-gnueabihf \
-		gcc-i686-linux-gnu \
-		gcc-mips64el-linux-gnuabi64 \
-		gcc-powerpc64le-linux-gnu \
-		gcc-riscv64-linux-gnu \
-		gcc-s390x-linux-gnu \
-		\
-		arch-test \
-		file \
-	; \
-	rm -rf /var/lib/apt/lists/*
-
-# https://musl.libc.org/releases.html
-ENV MUSL_VERSION 1.2.4
-RUN set -eux; \
-	wget -O musl.tgz.asc "https://musl.libc.org/releases/musl-$MUSL_VERSION.tar.gz.asc"; \
-	wget -O musl.tgz "https://musl.libc.org/releases/musl-$MUSL_VERSION.tar.gz"; \
-	\
-	export GNUPGHOME="$(mktemp -d)"; \
-	gpg --batch --keyserver keyserver.ubuntu.com --recv-keys '836489290BB6B70F99FFDA0556BCDB593020450F'; \
-	gpg --batch --verify musl.tgz.asc musl.tgz; \
-	gpgconf --kill all; \
-	rm -rf "$GNUPGHOME" musl.tgz.asc; \
-	\
-	mkdir /usr/local/src/musl; \
-	tar --extract --file musl.tgz --directory /usr/local/src/musl --strip-components 1; \
-	rm musl.tgz
-
-WORKDIR /usr/src/hello
 COPY . .
 
-
-RUN find \( -name 'hello' -or -name 'hello.txt' \) -exec file '{}' + -exec ls -lh '{}' +
-
-CMD ["./amd64/hello-world/hello"]
+CMD ["< ./hello.txt"]