Plume front arm support (#402)

* Update plume-front build to use a shell script that adds the necessary dependencies on arm (x86 left untouched inside the script)

* Fix cleanup portion of plume-front.sh

* Break wasm dependencies for arm out so they are run before the main builds to improve layer caching on subsequent docker builds

* Fixup dockerfile so wasm-deps can run properly and with fewer assumptions

* Move new scripts to script/ folder

* Remove saving of path as it's not actually not necessary

* Add rust-toolchain to early copy so it pulls the right rust release (addresses #400)

Dockerfile

@@ -10,12 +10,15 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     make \
     openssl \
     libssl-dev
+WORKDIR /scratch
+COPY script/wasm-deps.sh .
+RUN chmod a+x ./wasm-deps.sh && ./wasm-deps.sh
 WORKDIR /app
-COPY Cargo.toml Cargo.lock ./
+COPY Cargo.toml Cargo.lock rust-toolchain ./
 RUN cargo install diesel_cli --no-default-features --features postgres --version '=1.3.0'
 RUN cargo install cargo-web
 COPY . .
-RUN cargo web deploy -p plume-front
+RUN chmod a+x ./script/plume-front.sh && ./script/plume-front.sh
 RUN cargo install --path ./ --force --no-default-features --features postgres
 RUN cargo install --path plume-cli --force --no-default-features --features postgres
 RUN cargo clean