Make a separate step for building the cartridge

Closes #94.

Author: nickkkccc

src/main/resources/Dockerfile

@@ -31,5 +31,6 @@ ENV TARANTOOL_INSTANCES_FILE=$TARANTOOL_INSTANCES_FILE
 ENV TARANTOOL_CLUSTER_COOKIE=$TARANTOOL_CLUSTER_COOKIE
 COPY $CARTRIDGE_SRC_DIR $TARANTOOL_WORKDIR
 WORKDIR $TARANTOOL_WORKDIR
-CMD cartridge build && cartridge start --run-dir=$TARANTOOL_RUNDIR --data-dir=$TARANTOOL_DATADIR \
+RUN cartridge build
+CMD cartridge start --run-dir=$TARANTOOL_RUNDIR --data-dir=$TARANTOOL_DATADIR \
     --log-dir=$TARANTOOL_LOGDIR --cfg=$TARANTOOL_INSTANCES_FILE