Update Dockerfile

Move COPY /entrypoint.sh to bottom and make sure entrypoint.sh have execute permission

docker/Dockerfile

@@ -1,8 +1,5 @@
 FROM progrium/busybox
 
-COPY entrypoint.sh /entrypoint.sh
-COPY Dockerfile /etc/Dockerfile
-
 RUN opkg-install curl
 RUN echo tlsv1 >> ~/.curlrc
 
@@ -15,4 +12,7 @@ EXPOSE 9333
 
 VOLUME /data
 
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+
 ENTRYPOINT ["/entrypoint.sh"]