Dockerfile

# Use the specified Debian image
FROM debian:stable-slim

# 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 mkdir -p /etc/openvpn/pki && \
    cp -r /usr/share/easy-rsa/* /etc/openvpn/pki && \
    cd /etc/openvpn/pki && \
    ./easyrsa init-pki && \
    ./easyrsa --batch build-ca nopass && \
    ./easyrsa --batch gen-dh && \
    ./easyrsa --batch build-server-full server nopass && \
    openvpn --genkey secret ta.key

# Expose port 1194 for OpenVPN
EXPOSE 1194/udp

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