Add Rust toolchain installation to dashboard Dockerfile

Install Rust nightly toolchain in the dashboard Docker image to support potential Rust-based dependencies or build processes

Author: andrewm4894

docker/Dockerfile.anomstack_dashboard

@@ -2,6 +2,8 @@ FROM python:3.11-slim
 
 RUN apt-get update && apt-get install -y git
 
+RUN curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain nightly -y
+
 WORKDIR /opt/dagster/app
 
 RUN apt-get update && apt-get install -y \