Docker: Add a Dockerfile and Makefile targets (#373)

* add docker build option

* add docker section in makefile

* add bash_aliases to get different prompt

docker/Dockerfile

@@ -0,0 +1,40 @@
+FROM rustlang/rust:nightly
+
+ENV IMAGE_NAME=blog_os-docker
+
+RUN apt-get update && \
+    apt-get install -q -y --no-install-recommends \
+    nasm \
+    binutils \
+    grub-common \
+    xorriso \
+    grub-pc-bin && \
+    apt-get autoremove -q -y && \
+    apt-get clean -q -y && \
+    rm -rf /var/lib/apt/lists/* && \
+    cargo install xargo && \
+    rustup component add rust-src
+
+ENV GOSU_VERSION 1.10
+
+RUN set -ex; \
+	\
+	fetchDeps=' \
+		ca-certificates \
+		wget \
+	'; \
+	apt-get update; \
+	apt-get install -y --no-install-recommends $fetchDeps; \
+	rm -rf /var/lib/apt/lists/*; \
+	\
+	dpkgArch="$(dpkg --print-architecture | awk -F- '{ print $NF }')"; \
+	wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$dpkgArch"; \
+	chmod +x /usr/local/bin/gosu; \
+# verify that the binary works
+	gosu nobody true; 
+
+COPY entrypoint.sh /usr/local/bin/
+COPY .bash_aliases /etc/skel/
+
+ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]
+CMD ["/bin/bash"]