echec Dockerfile

1_dockerfile/curl/Dockerfile

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+FROM ubuntu:20.04
+RUN apt-get update -yq \
+&& apt-get install curl gnupg -yq \
+&& apt-get clean -yq
+ADD . /curl/
+WORKDIR /curl
+EXPOSE 8080
+VOLUME /curl
+CMD ["curl", "https://example.com"]