revert(cistech-tunnel): restore to working state at 5d54ed6

- Removed build/ folder
- Restored source/ folder with original Dockerfile and entrypoint.sh
- Reverted config files to original working state
- Cleaned up shared/ to only contain host routing scripts

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/cistech-tunnel/build/build.sh

@@ -1,22 +0,0 @@
-#!/bin/bash
-# Build and push the Cistech VPN Docker image
-# Run this from the build directory
-
-set -euo pipefail
-
-IMAGE_NAME="${IMAGE_NAME:-git.alexzaw.dev/alexz/cistech-vpn}"
-IMAGE_TAG="${IMAGE_TAG:-latest}"
-
-echo "Building ${IMAGE_NAME}:${IMAGE_TAG}..."
-
-docker build "$@" -t "${IMAGE_NAME}:${IMAGE_TAG}" .
-docker push "${IMAGE_NAME}:${IMAGE_TAG}"
-
-echo ""
-echo "Build complete!"
-echo ""
-echo "To test locally:"
-echo "  docker run -d --privileged --cap-add=NET_ADMIN --device=/dev/net/tun -p 5901:5901 -p 6092:6092 ${IMAGE_NAME}:${IMAGE_TAG}"
-echo ""
-echo "Then connect via VNC to localhost:5901 or open noVNC at http://localhost:6092/vnc.html"
-echo ""