Dockerfile

# Use an official lightweight Alpine Linux image as the base
FROM alpine:latest

# Install dnsmasq and curl (for health checks)
RUN apk --no-cache add dnsmasq curl

# Create dnsmasq.conf inline
RUN printf "address=/lehrastudio.com/195.179.239.105\nlog-queries\nlisten-address=0.0.0.0\n" > /etc/dnsmasq.conf

# Expose port 7860 (the custom DNS port)
EXPOSE 7860/udp

# Command to start dnsmasq in the foreground and listen on port 7860
CMD ["dnsmasq", "-k", "--port=7860"]