Update using_docker.md

docs/using_docker.md

@@ -7,7 +7,9 @@ Advantages:
  - very easy to start development without dependencies conflicts
 
 ***Note***: permissions and ownership will be transfered 1-to-1 from host to container and backwards. It means, that file owned by `user:user` (**id=1000**) will be owned inside container by some other user (probably the same) **with id=1000**.
+
 It means, that file created inside container by `root` will be owned by `root` on the host! 
+
 -----
 
 First of all, you should clone `iroha` repository with all submodules to your host machine:
@@ -44,4 +46,4 @@ docker-compose down
 
 # How to use docker and docker-compose for production
 
-***TBD***
+***TBD***