build: with a fixed rust toolchain

Author: l0ngvh

Dockerfile

@@ -17,6 +17,7 @@ COPY --from=planner /app/recipe.json recipe.json
 
 RUN cargo chef cook --release --recipe-path recipe.json
 
+COPY rust-toolchain.toml .
 COPY Cargo.toml .
 COPY Cargo.lock .
 COPY src src

rust-toolchain.toml

@@ -0,0 +1,4 @@
+[toolchain]
+channel = "1.76.0"
+components = [ "rustfmt", "clippy", "rust-analyzer" ]
+profile = "default"