fix: add build-time binary search + runtime path-finder for purevpn-cli

vpn-node/Dockerfile

@@ -16,7 +16,11 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 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 \
-    && rm -f /tmp/cli-install.sh
+    && rm -f /tmp/cli-install.sh \
+    && echo ">>> purevpn-cli install search:" \
+    && find / -maxdepth 8 -name "purevpn*" 2>/dev/null || true \
+    && echo ">>> /etc/pure-linux-cli contents:" \
+    && ls -la /etc/pure-linux-cli/ 2>/dev/null || echo "(directory not found)"
 
 # ── 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/