joystream/node docker file eliminate intermediate rust-builder image

joystream-node.Dockerfile

@@ -1,4 +1,11 @@
-FROM joystream/rust-builder AS builder
+FROM liuchong/rustup:1.46.0 AS rustup
+RUN rustup component add rustfmt clippy
+RUN rustup install nightly-2020-05-23 --force
+RUN rustup target add wasm32-unknown-unknown --toolchain nightly-2020-05-23
+RUN apt-get update && \
+  apt-get install -y curl git gcc xz-utils sudo pkg-config unzip clang libc6-dev-i386
+
+FROM rustup AS builder
 LABEL description="Compiles all workspace artifacts"
 WORKDIR /joystream
 COPY . /joystream

rust-builder.Dockerfile

@@ -1,8 +0,0 @@
-FROM liuchong/rustup:1.46.0 AS builder
-LABEL description="Rust and WASM build environment for joystream and substrate"
-
-WORKDIR /setup
-COPY setup.sh /setup
-ENV TERM=xterm
-
-RUN ./setup.sh