Pin rust version to prevent unexpected breakages due to rust changes

- For now, we can pin to 1.87
- This can be updated semi regularly to keep pace with new rust features

Author: fontivan

Dockerfile

@@ -1,4 +1,5 @@
-FROM rust:1 AS chef
+# The rust version is pinned to prevent unexpected breakages due to rust changes.
+FROM rust:1.87 AS chef
 RUN cargo install cargo-chef
 WORKDIR /app