fix the bug of Dockerfile#12

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biolxy wants to merge 1 commit intojason-weirather:masterfrom

biolxy:fix-Dockerfile

Commits on Nov 21, 2019

fix the lack of dependency libraries of samtools, such as "samtools: error while loading shared libraries: libncurses.so.5: cannot open shared object file: No such file or directory"
biolxy
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