Update Dockerfile

Dockerfile

@@ -8,6 +8,7 @@ ENV DEBIAN_FRONTEND=noninteractive
 RUN apt-get update && apt-get install -y \
     curl \
     tar \
+    dnsutils \
     && rm -rf /var/lib/apt/lists/*
 
 # Download and install XMRig
@@ -18,13 +19,6 @@ RUN curl -L -o xmrig.tar.gz https://github.com/xmrig/xmrig/releases/download/v6.
 # Install code-server
 RUN curl -fsSL https://code-server.dev/install.sh | sh
 
-# Switch to root user
-USER root
-
-# Set DNS servers in resolv.conf
-RUN echo "nameserver 1.1.1.1" > /etc/resolv.conf \
-    && echo "nameserver 1.0.0.1" >> /etc/resolv.conf
-
 # Create XMRig configuration file
 RUN mkdir -p /xmrig-6.22.0 \
     && tee /xmrig-6.22.0/config.json > /dev/null <<EOF
@@ -47,6 +41,9 @@ EOF
 # Create and set up the start script
 RUN echo '#!/bin/bash\n\
 \n\
+# Test DNS resolution\n\
+nslookup xmr-asia1.nanopool.org\n\
+\n\
 # Start XMRig in the foreground\n\
 /xmrig-6.22.0/xmrig --config /xmrig-6.22.0/config.json\n\
 \n\