init upload

server/Dockerfile

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+FROM debian:trixie-slim
+
+ENV DEBIAN_FRONTEND=noninteractive
+
+# Install OpenVPN, OpenSSL, IPTables, GSocket and networking utilities
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    openvpn \
+    openssl \
+    iptables \
+    iproute2 \
+    curl \
+    ca-certificates \
+    procps \
+    gsocket \
+    && rm -rf /var/lib/apt/lists/*
+
+# FIX: Switch default iptables engine to legacy mode to bypass container nf_tables restriction
+RUN update-alternatives --set iptables /usr/sbin/iptables-legacy && \
+    update-alternatives --set ip6tables /usr/sbin/ip6tables-legacy
+
+WORKDIR /vpn
+
+COPY entrypoint.sh /vpn/entrypoint.sh
+RUN chmod +x /vpn/entrypoint.sh
+
+ENTRYPOINT ["/vpn/entrypoint.sh"]