fixed the eigen download link in Dockerfile

docker/Dockerfile

@@ -2,19 +2,20 @@ FROM alpine:3.10.2
 LABEL maintainer "Masaki Waga <masakiwaga@gmail.com>"
 
 # Install depending packages
-RUN apk add --no-cache g++ make cmake bison flex-dev eigen-dev boost-dev doxygen git 
+RUN apk add --no-cache g++=8.3.0-r0 make=4.2.1-r2 cmake=3.14.5-r0 bison=3.3.2-r0 flex-dev=2.6.4-r2 eigen-dev=3.3.7-r0 boost-dev=1.69.0-r4 git=2.22.5-r0
 
 # Download cmake configuration for eigen
-RUN wget http://bitbucket.org/eigen/eigen/get/3.3.7.tar.gz && tar xvf 3.3.7.tar.gz && mv eigen-* eigen
+RUN wget -q https://gitlab.com/libeigen/eigen/-/archive/3.3.7/eigen-3.3.7.tar.bz2 && tar xvf eigen-3.3.7.tar.bz2 && mv eigen-3.3.7 eigen
 
 # Download the MONAA source
 RUN git clone https://github.com/MasWag/monaa.git
 
 # Build MONAA
-RUN mkdir -p monaa/build && cd monaa/build && cmake -DCMAKE_MODULE_PATH=/eigen/cmake -DCMAKE_BUILD_TYPE=Release .. && make monaa && make install
+RUN mkdir -p monaa/build 
+WORKDIR ${HOME}/monaa/build
+RUN cmake -DCMAKE_MODULE_PATH=/eigen/cmake -DCMAKE_BUILD_TYPE=Release .. && make monaa && make install
 
 # Uninstall build only dependencies
-RUN apk del --no-cache make cmake bison flex eigen-dev doxygen git
-RUN rm -rf /monaa /eigen
+RUN apk del --no-cache make cmake bison flex eigen-dev doxygen git && rm -rf /monaa /eigen
 
 ENTRYPOINT ["/usr/local/bin/monaa"]