Add Dockerfile for server & studio

1. Add hosts to speed up image download
2. Modify some configs to enable the server to run better in container
3. Because Dockerfile doesn't allow multiple startup commands, currently only the server will be automatically started after the container is started. If you want to start studio, you can enter the container to start it.

Here is a simple container start command:
```bash
docker run -it --name=graph -p 18080:8080 -p 18088:8088 hugegraph:0.10 /bin/bash
```

Dockerfile

@@ -0,0 +1,46 @@
+FROM ubuntu:xenial
+
+LABEL maintainer="HugeGraph Docker Maintainers <[email protected]>"
+
+ENV PKG_URL https://github.com/hugegraph
+
+# 1. Install needed dependencies of GraphServer & RocksDB
+RUN set -x \
+    && apt-get -q update \
+    && apt-get -q install -y --no-install-recommends --no-install-suggests \
+    curl \
+    lsof \
+    g++ \
+    gcc \
+    openjdk-8-jdk \ 
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/* 
+
+# 2. Init HugeGraph Sever (speed up)
+RUN set -e \
+    && echo "192.30.253.112 github.com\n151.101.44.249 github.global.ssl.fastly.net" >> /etc/hosts \
+    && mkdir -p /root/server \
+    && curl -L -S ${PKG_URL}/hugegraph/releases/download/v0.10.4/hugegraph-0.10.4.tar.gz -o /root/server.tar.gz \
+    && tar xzf /root/server.tar.gz --strip-components 1 -C /root/server \
+    && rm /root/server.tar.gz \
+    && cd /root/server/ \
+    && sed -i "s/^restserver.url.*$/restserver.url=http:\/\/0.0.0.0:8080/g" ./conf/rest-server.properties \
+    && sed -n '63p' ./bin/start-hugegraph.sh | grep "&" > /dev/null && sed -i 63{s/\&$/#/g} ./bin/start-hugegraph.sh \
+    && sed -n '74p' ./bin/start-hugegraph.sh | grep "exit" > /dev/null && sed -i 74{s/^/#/g} ./bin/start-hugegraph.sh \
+    && ./bin/init-store.sh
+
+# 3. Prepare for HugeGraph Studio
+RUN set -e \
+    && echo "192.30.253.112 github.com\n151.101.44.249 github.global.ssl.fastly.net" >> /etc/hosts \
+    && mkdir -p /root/studio \
+    && curl -L -S ${PKG_URL}/hugegraph-studio/releases/download/v0.10.0/hugegraph-studio-0.10.0.tar.gz -o /root/studio.tar.gz \
+    && tar xzf /root/studio.tar.gz --strip-components 1 -C /root/studio \
+    && rm /root/studio.tar.gz \
+    && sed -i "s/^studio.server.host.*$/studio.server.host=0.0.0.0/g" /root/studio/conf/hugegraph-studio.properties \
+    && sed -i "s/^graph.server.host.*$/graph.server.host=0.0.0.0/g" /root/studio/conf/hugegraph-studio.properties
+
+EXPOSE 8080
+EXPOSE 8088
+WORKDIR /root
+
+ENTRYPOINT ["./server/bin/start-hugegraph.sh"]

hugegraph-dist/src/assembly/static/conf/hugegraph.properties

@@ -42,7 +42,7 @@ cassandra.password=
 # hbase backend config
 #hbase.hosts=localhost
 #hbase.port=2181
-#hbase.znode_parent=/hbsae
+#hbase.znode_parent=/hbase
 #hbase.threads_max=64
 
 # mysql backend config