Install wasm toolchain before ADDing files to docker images

Enables caching the wasm toolchain.

orchestration/coordinator/Dockerfile

@@ -21,6 +21,9 @@ RUN apt install -y pkg-config clang
 # Dependencies for the Serai node
 RUN apt install -y make protobuf-compiler
 
+# Add the wasm toolchain
+RUN rustup target add wasm32-unknown-unknown
+
 # Add files for build
 ADD common /serai/common
 ADD crypto /serai/crypto
@@ -37,9 +40,6 @@ ADD AGPL-3.0 /serai
 
 WORKDIR /serai
 
-# Add the wasm toolchain
-RUN rustup target add wasm32-unknown-unknown
-
 # Mount the caches and build
 RUN --mount=type=cache,target=/root/.cargo \
   --mount=type=cache,target=/usr/local/cargo/registry \