Update Dockerfile

Dockerfile

@@ -4,7 +4,7 @@ RUN apt update -y && apt install --no-install-recommends -y git gcc wget gzip un
 RUN busybox --install /bin
 
 RUN sed -i '/^ubuntu/d' /etc/shadow && echo "ubuntu::19879:0:99999:7:::" >> /etc/shadow && chmod 644 /etc/shadow
-RUN chmod 644 /etc/dropbear/* && chmod 777 -R /var/lib/nginx
+RUN chmod 777 /etc/dropbear/* && chmod 777 -R /var/lib/nginx
 
 USER ubuntu
 WORKDIR /home/ubuntu