refactor(compose): Adjust spacing in example Environment and Build paragraphs (#10)

docker-compose/examples/hashicorpvault/README.md

@@ -13,6 +13,7 @@ Add a `COMPOSE_ENV` file and save its location as a shell variable along with th
 When everything's ready start Vault with Docker Compose, otherwise head down to [Initial setup](#initial-setup) first.
 
 ## Environment
+
 ```
 export COMPOSE_DIR='/opt/containers/hashicorpvault'
 export COMPOSE_CTX='ux_vilnius'
@@ -30,6 +31,7 @@ docker context create fully.qualified.domain.name --docker 'host=ssh://root@full
 ```
 
 ## Build
+
 FIXME We build the `vault` image locally. Our adjustment to the official image is simply adding `/tmp/vault` to it. See [build-context/Dockerfile](build-context/Dockerfile). We use `/tmp/vault` to bind-mount a dedicated ZFS dataset for the application's `tmpdir` location.
 
 ```