nifi: Add final chown and chmod to separate image layers

Author: siegfriedweber

nifi/Dockerfile

@@ -106,6 +106,9 @@ pip install --no-cache-dir \
 ln -s /stackable/stackable-bcrypt.jar /bin/stackable-bcrypt.jar
 EOF
 
+RUN chown -R ${STACKABLE_USER_UID}:0 /stackable
+RUN chmod -R g=u /stackable
+
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