Use Rust nightly in docker for integration test

Yijie Shen · Yijie Shen · commit ecb44ba151c1 · 2021-06-22T11:05:45.000+08:00
diff --git a/dev/docker/ballista-base.dockerfile b/dev/docker/ballista-base.dockerfile
@@ -96,4 +96,6 @@ RUN cargo install cargo-build-deps
 
 # prepare toolchain
 RUN rustup update && \
+    rustup toolchain install nightly-2021-05-10 && \
+    rustup default nightly-2021-05-10 && \
     rustup component add rustfmt
