added readme: docker hub link, docker run/create sample, cmd to retrieve hostname

README.md

@@ -0,0 +1,31 @@
+# docker container: tor hidden .onion service
+
+docker hub: https://hub.docker.com/r/fphammerle/onion-service
+
+## example 1
+
+```sh
+$ docker run --name onion-service \
+    -e VIRTUAL_PORT=80 -e TARGET=1.1.1.1:80 \
+    fphammerle/onion-service
+```
+
+## example 2
+
+```sh
+$ docker create --name onion-service \
+    --env VIRTUAL_PORT=80 \
+    --env TARGET=1.1.1.1:80 \
+    --volume onion-key:/onion-service \
+    --restart unless-stopped \
+    fphammerle/onion-service:latest
+
+$ docker start onion-service
+```
+
+## retrieve hostname
+
+```sh
+$ docker exec onion-service cat /onion-service/hostname
+abcdefghijklmnop.onion
+```