add build script

build-in-docker.sh

+# image: ubuntu:20.04
+
+# build time
+apt install -y autoconf autoconf-archive autoconf2.13 automake autotools-dev libboost1.71-all-dev build-essential git libbz2-dev libmagic-dev libnss-db libsodium-dev libssl-dev libtool shtool xz-utils libgraphicsmagick1-dev libgraphicsmagick-q16-3 libpng-dev libicu-dev libjemalloc-dev liblz4-dev libzstd-dev librocksdb-dev clang llvm-dev
+
+git clone https://github.com/matrix-construct/construct
+cd construct
+./autogen.sh
+./configure --with-included-rocksdb=v6.12.7
+make -j$(nproc)
+make install DESTDIR=/fakeroot
+cp ./deps/rocksdb/librocksdb.so* /fakeroot/usr/lib/
+strip --strip-debug /fakeroot/usr/lib/*.so*
+cd /fakeroot && tar -cvzf construct-pkg.tar.gz usr
+
+
+