fix: cargo-chef panic issue

[silathdiir]

@Thegaram and @colinlyguo helped find and debug a cargo-chef panic issue as:

> [builder 2/4] RUN cargo chef cook --release --recipe-path recipe.json:
#  Updating [crates.io](http://crates.io/) index
# thread ‘main’ panicked at ‘Process terminated by signal’, /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/cargo-chef-0.1.41/src/recipe.rs:162:21

@Thegaram helped found the solution in this cargo-chef issue - LukeMathWalker/cargo-chef#107

I build and tested the base docker image rust-alpine-builder and testnet/whitelist_backend (with base image) on both local Mac and staging server. It worked for me.

Should we update these two docker images to another tag or just remain the same (since we don't update rust version)?

[0xmountaintop]

Should we update these two docker images to another tag or just remain the same (since we don't update rust version)?

I think we can leave them remain the same