frontend: Multiple stage builds

Signed-off-by: YujiOshima <yuji.oshima0x3fd@gmail.com>

manager/modeldb/Dockerfile

@@ -1,35 +1,14 @@
-FROM node:latest
-
-EXPOSE 3000
-
-RUN apt-get update \
-    && apt-get install -y \
-        g++ \
-        make \
-        wget \
-		git \
-    && apt-get clean
-
-WORKDIR /root
-
-# Install Thrift 0.10.0
-RUN wget -q http://archive.apache.org/dist/thrift/0.10.0/thrift-0.10.0.tar.gz && \
-    tar -xzf thrift-0.10.0.tar.gz && \
-    cd thrift-0.10.0 && \
-    ./configure --without-python && \
-    make && \
-    ln -n ~/thrift-0.10.0/compiler/cpp/thrift /usr/local/bin/thrift
-
-RUN cd / && git clone https://github.com/mitdbg/modeldb
-
+FROM thrift:0.11  AS build-env
+RUN apt-get update && apt-get install -y git
+RUN git clone https://github.com/mitdbg/modeldb
 ADD manager/modeldb/frontend /modeldb/frontend
-
 WORKDIR /modeldb/frontend
-
-RUN  npm install
-
 RUN mkdir -p './thrift' && \
-    thrift -r -out './thrift' -gen js:node '../thrift/ModelDB.thrift' && \
-    npm install
-ENTRYPOINT ["/modeldb/dockerbuild/wait_for_backend.sh"]
-CMD ["backend"]
+    thrift -r -out './thrift' -gen js:node '../thrift/ModelDB.thrift' 
+
+FROM node:alpine
+COPY --from=build-env /modeldb /modeldb
+WORKDIR /modeldb/frontend
+RUN npm install
+EXPOSE 3000
+ENTRYPOINT ["sh","/modeldb/dockerbuild/wait_for_backend.sh"]