Add Ubuntu18.04 docker

.dockerignore

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+*/*

Dockerfile

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+FROM ubuntu:18.04
+LABEL maintainer="dinghao188" \
+      version="1.1" \
+      description="ubuntu 18.04 with tools for tsinghua's rCore-Tutorial-V3"
+
+#install some deps
+RUN set -x \
+    && apt-get update \
+    && apt-get install -y curl wget autoconf automake autotools-dev curl libmpc-dev libmpfr-dev libgmp-dev \
+              gawk build-essential bison flex texinfo gperf libtool patchutils bc xz-utils \
+              zlib1g-dev libexpat-dev pkg-config  libglib2.0-dev libpixman-1-dev git tmux python3 
+
+#install rust and qemu
+RUN set -x; \
+    RUSTUP='/root/rustup.sh' \
+    && cd $HOME \
+    #install rust
+    && curl https://sh.rustup.rs -sSf > $RUSTUP && chmod +x $RUSTUP \
+    && $RUSTUP -y --default-toolchain nightly --profile minimal \
+
+    #compile qemu
+    && wget https://ftp.osuosl.org/pub/blfs/conglomeration/qemu/qemu-5.0.0.tar.xz \
+    && tar xvJf qemu-5.0.0.tar.xz \
+    && cd qemu-5.0.0 \
+    && ./configure --target-list=riscv64-softmmu,riscv64-linux-user \
+    && make -j$(nproc) install \
+    && cd $HOME && rm -rf qemu-5.0.0 qemu-5.0.0.tar.xz
+
+#for chinese network
+RUN set -x; \
+    APT_CONF='/etc/apt/sources.list'; \
+    CARGO_CONF='/root/.cargo/config'; \
+    BASHRC='/root/.bashrc' \
+    && echo 'export RUSTUP_DIST_SERVER=https://mirrors.ustc.edu.cn/rust-static' >> $BASHRC \
+    && echo 'export RUSTUP_UPDATE_ROOT=https://mirrors.ustc.edu.cn/rust-static/rustup' >> $BASHRC \
+    && touch $CARGO_CONF \
+    && echo '[source.crates-io]' > $CARGO_CONF \
+    && echo "replace-with = 'ustc'" >> $CARGO_CONF \
+    && echo '[source.ustc]' >> $CARGO_CONF \
+    && echo 'registry = "git://mirrors.ustc.edu.cn/crates.io-index"' >> $CARGO_CONF

Makefile

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+DOCKER_NAME ?= dinghao188/rcore-tutorial
+.PHONY: docker build_docker
+
+docker:
+	docker run --rm -it --mount type=bind,source=$(shell pwd),destination=/mnt ${DOCKER_NAME}
+
+build_docker: 
+	docker build -t ${DOCKER_NAME} .

README.md

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 # rCore-Tutorial-v3
-rCore-Tutorial version 3.
+rCore-Tutorial version 3.