feat: add tor-proxy service for SSH and admin panel access via Tor

- Add tor-proxy/Dockerfile: Alpine + Tor with entrypoint
- Add tor-proxy/entrypoint.sh: dynamic torrc generation with env var validation
- Update docker-compose.yml: add tor-proxy service with shared tor_proxy_net network
- Two Tor hidden services: SSH (port 22) and admin panel (port 80 -> 3001)
- Update .env.example: add SSH_HOST_IP, SHOP_CONTAINER, ADMIN_PORT vars

tor-proxy/Dockerfile

@@ -0,0 +1,12 @@
+FROM alpine:3.18
+
+RUN apk add --no-cache \
+    tor \
+    bash
+
+COPY entrypoint.sh /usr/local/bin/entrypoint.sh
+RUN chmod +x /usr/local/bin/entrypoint.sh
+
+EXPOSE 22 80
+
+ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]