feat(build): add rustup to the release image (#17100) (#17126)

Signed-off-by: Runji Wang <[email protected]>
Co-authored-by: Runji Wang <[email protected]>

Author: github-actions[bot]

docker/Dockerfile

@@ -124,9 +124,14 @@ LABEL org.opencontainers.image.source https://github.com/risingwavelabs/risingwa
 RUN apt-get update && apt-get -y install linux-tools-generic \
     && ln -s "$(find /usr/lib/linux-tools/*/perf | head -1)" /usr/local/bin/perf
 
-RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get -y install gdb libpam-krb5 krb5-user telnet kafkacat \
+RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get -y install gdb libpam-krb5 krb5-user telnet kafkacat rustup \
   && rm -rf /var/lib/{apt,dpkg,cache,log}/
 
+# Set default Rust toolchain but don't install it to keep the image size small
+# The toolchain will be installed when it is first used
+# Do not use `rustup default stable` because it will install immediately
+RUN rustup show && sed -i '1s/^/default_toolchain = "stable"\n/' ~/.rustup/settings.toml
+
 RUN mkdir -p /risingwave/bin/connector-node && mkdir -p /risingwave/lib
 
 COPY --from=rust-builder /risingwave/bin/risingwave /risingwave/bin/risingwave