staging of project have been changed.

Dockerfile

@@ -4,6 +4,7 @@ MAINTAINER Loafle <rnd@loafle.com>
 ENV APP_FILENAME="com.loafle.overflow.overflow_server-1.0.0-SNAPSHOT.jar" \
     APP_HOME_PATH="/service" \
     APP_MAIN_CLASS="com.loafle.overflow.OFMain" \
+    APP_CONF_PATH="/opt/conf" \
     PATH="$PATH:/opt/bin"
 
 ADD docker/bin/*.sh /opt/bin/
@@ -21,7 +22,7 @@ RUN curl -fsSL https://github.com/krallin/tini/releases/download/v${TINI_VERSION
     && chmod +x /bin/tini \
     && echo "$TINI_SHA  /bin/tini" | sha256sum -c -
 
-
+VOLUME ${APP_CONF_PATH}
 EXPOSE 50006
 
 ENTRYPOINT ["/bin/tini", "--"]