Make start script for docker retain JAVA_OPTS
Make start script for docker retain JAVA_OPTS

The script was overriding JAVA_OPTS completely, which prevented users from passing options to the JVM.
blueoceanideas/metabase,blueoceanideas/metabase,blueoceanideas/metabase,blueoceanideas/metabase,blueoceanideas/metabase