fix: replace microsocks with dante-server (apt package, no compilation)

- Removes gcc/make/git and the microsocks git clone+build step
- Installs dante-server from apt — zero compilation required
- danted uses 'external: tun0' to explicitly route all proxied traffic
  through the VPN interface, more reliable than iptables-based routing
- Config is generated at runtime after tun0 is confirmed up

vpn-node/Dockerfile

@@ -1,10 +1,10 @@
 FROM debian:bookworm-slim
 
-LABEL description="microsocks + purevpn-cli exit node"
+LABEL description="dante SOCKS5 + purevpn-cli exit node"
 
 # ── System dependencies ───────────────────────────────────────────────────────
 RUN apt-get update && apt-get install -y --no-install-recommends \
-        gcc make git \
+        dante-server \
         curl wget ca-certificates \
         iproute2 iptables iputils-ping \
         netcat-openbsd procps dnsutils \
@@ -12,7 +12,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     && rm -rf /var/lib/apt/lists/*
 
 # ── Install purevpn-cli (official installer) ──────────────────────────────────
-# Running as root inside Docker so no sudo needed.
+# Running as root inside Docker — no sudo needed.
 RUN curl -fsSL https://apps.purevpn-tools.com/cross-platform/linux-cli/production/cli-install.sh \
         -o /tmp/cli-install.sh \
     && bash /tmp/cli-install.sh \
@@ -21,13 +21,6 @@ RUN curl -fsSL https://apps.purevpn-tools.com/cross-platform/linux-cli/productio
 # ── Add purevpn-cli to PATH (as per official docs) ────────────────────────────
 ENV PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin:/etc/pure-linux-cli/
 
-# ── Build microsocks from source ──────────────────────────────────────────────
-RUN git clone --depth 1 https://github.com/rofl0r/microsocks.git /tmp/microsocks \
-    && cd /tmp/microsocks \
-    && make \
-    && cp microsocks /usr/local/bin/microsocks \
-    && rm -rf /tmp/microsocks
-
 # ── Location list ─────────────────────────────────────────────────────────────
 COPY servers.txt /etc/vpndock/servers.txt