build: Add toolchain

toolchain/Dockerfile

@@ -0,0 +1,42 @@
+FROM debian:buster-slim
+ENV DEBIAN_FRONTEND noninteractive
+
+ENV TZ=America/New_York
+RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
+
+RUN apt-get -y update && apt-get -y install \
+	bc \
+    build-essential \
+    bzip2 \
+	bzr \
+	cmake \
+	cmake-curses-gui \
+	cpio \
+	device-tree-compiler \
+	git \
+	imagemagick \
+	libncurses5-dev \
+	locales \
+	make \
+	p7zip-full \
+	rsync \
+	sharutils \
+	scons \
+	tree \
+	unzip \
+	vim \
+	wget \
+	zip \
+  && rm -rf /var/lib/apt/lists/*
+
+RUN mkdir -p /root/workspace
+WORKDIR /root
+
+COPY support .
+RUN ./build-toolchain.sh
+RUN cat ./setup-env.sh >> .bashrc
+
+VOLUME /root/workspace
+WORKDIR /root/workspace
+
+CMD ["/bin/bash"]