add dockerfile and config

docker/Dockerfile

@@ -0,0 +1,15 @@
+## syntax=docker/dockerfile:3
+
+FROM alpine
+
+# Install tor
+RUN apk --no-cache add tor
+
+# Copy config
+COPY ./torrc /etc/tor/torrc
+
+CMD chmod 700 /var/lib/tor/hidden-service ;\
+	chown -R tor /var/lib/tor/hidden-service;\
+	cat /var/lib/tor/hidden-service/hostname 2>/dev/null;\
+	/usr/bin/tor -f /etc/tor/torrc --runasdaemon 0
+