Dockerfile

# Use the specified Debian image
FROM docker.io/library/debian:latest
# Install OpenVPN and Easy-RSA
RUN apt-get update && \
    apt-get install -y openvpn easy-rsa iptables && \
    rm -rf /var/lib/apt/lists/*

# Set up configuration files and keys
COPY openvpn-server.conf /etc/openvpn/server.conf

# Initialize Easy-RSA PKI
RUN make-cadir /etc/openvpn/vars && \
    cd /etc/openvpn/vars && \
    . ./vars && \
    ./clean-all && \
    ./build-ca --batch && \
    ./build-key-server --batch server && \
    ./build-dh --batch

# Expose port 1194 for OpenVPN
EXPOSE 1194/udp

# Run OpenVPN server
CMD ["openvpn", "--config", "/etc/openvpn/server.conf"]