update dockerfile

Dockerfile

@@ -9,8 +9,8 @@ RUN apt-get update && apt-get -y install curl software-properties-common && \
     # Download and install dumb-init manually based on architecture
     arch=$(dpkg --print-architecture) && \
     if [ "$arch" = "arm64" ]; then arch="aarch64"; fi && \
-    curl -Lo /usr/local/bin/dumb-init "https://github.com/Yelp/dumb-init/releases/download/v1.2.5/dumb-init_1.2.5_${arch}" && \
-    chmod +x /usr/local/bin/dumb-init && \
+    curl -Lo /tmp/dumb-init.deb "https://github.com/Yelp/dumb-init/releases/download/v1.2.5/dumb-init_1.2.5_${arch}.deb" && \
+    dpkg -i /tmp/dumb-init.deb && rm -f /tmp/dumb-init.deb && \
     # Install other dependencies
     apt-get -y install iputils-ping dnsutils bash jq net-tools openvpn curl ufw deluged deluge-web p7zip-full unrar unzip && \
     echo "Cleanup" && \