My own repo with exiting with programs exit code.

Dockerfile

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+FROM ubuntu:20.04
+
+ARG TARGETARCH
+
+# Dependencies
+RUN apt-get update && apt-get install -y --no-install-recommends tini && rm -rf /var/lib/apt/lists/*
+
+# Application
+COPY ./dist/${TARGETARCH}/ttyd /usr/bin/ttyd
+
+EXPOSE 7681
+WORKDIR /root
+
+ENTRYPOINT ["/usr/bin/tini", "--"]
+CMD ["ttyd", "-W", "bash"]