fix Dockerfile

remove lines to decrease container size. it was causing the service to
fail

Dockerfile

@@ -2,20 +2,10 @@ FROM ubuntu:17.04
 MAINTAINER Seth Miller <[email protected]>
 
 RUN apt-get -qq update && \
-    apt-get install --no-install-recommends -qq libaio1 rpm wget && \
+    apt-get install --no-install-recommends -qq libaio1 rpm wget -y && \
     wget --no-check-certificate https://www.dropbox.com/s/f2ul3y0854y8oqw/oracle-instantclient12.2-basic-12.2.0.1.0-1.x86_64.rpm && \
     rpm -Uvh --nodeps oracle*rpm && \
-    rm -f oracle*rpm && \
-    dpkg --purge rpm wget libicu57 libxml2 libarchive13 rpm2cpio rpm-common debugedit libcap2 libdbus-1-3 \
-                 libelf1 libgdbm3 libidn11 liblua5.2-0 liblzo2-2 libmagic-mgc libmagic1 libnettle6 libnspr4 \
-                 libnss3 libpopt0 librpm3 librpmbuild3 librpmio3 librpmsign3 libperl5.24 perl && \
-    rm -rf /var/lib/apt/lists/* && \
-    rm -rf /usr/share/perl && \
-    rm -rf /usr/share/doc && \
-    rm -rf /usr/share/locale && \
-    rm -rf /usr/share/man && \
-    rm -rf /usr/lib/oracle/12.2/client64/lib/libociei.so && \
-    rm -rf /usr/lib/oracle/12.2/client64/lib/*jar
+    rm -f oracle*rpm
 
 ENV LD_LIBRARY_PATH /usr/lib/oracle/12.2/client64/lib