Update README.md

Author: pragmatic

README.md

@@ -19,30 +19,36 @@ Documentation for each subcommand:
 
 Using Docker links to `postgres` container. This will display the usage information:
 
-```docker run --rm -i -t --link myserver:postgres docker.io/panubo/postgres-toolbox```
+```console
+docker run --rm -i -t --link myserver:postgres docker.io/panubo/postgres-toolbox
+```
 
 To run the subcommand:
 
-```docker run --rm -i -t --link myserver:postgres docker.io/panubo/postgres-toolbox <subcommand>```
+```console
+docker run --rm -i -t --link myserver:postgres docker.io/panubo/postgres-toolbox <subcommand>
+```
 
 ## Configuration
 
 Use `--link <postgres container name>:postgres` to automatically specify the required variables.
 
 Or alternatively specify the environment variables:
 
-- `DATABASE_HOST` = IP / hostname of PostgreSQL server.
-- `DATABASE_PORT` = TCP Port of PostgreSQL service.
-- `DATABASE_USER` = Administrative user eg postgres with SUPERUSER privileges.
-- `DATABASE_PASS` = Password of administrative user.
+| Name | Description |
+| --- | --- |
+| `DATABASE_HOST` | IP / hostname of PostgreSQL server. |
+| `DATABASE_PORT` | TCP Port of PostgreSQL service. |
+| `DATABASE_USER` | Administrative user eg postgres with SUPERUSER privileges. |
+| `DATABASE_PASS` | Password of administrative user. |
 
 Some subcommands require additional environment parameters.
 
 ## Testing
 
 [bats](https://bats-core.readthedocs.io/en/stable/index.html) is used for testing. To test the image and commands bats and docker are required. Use the following commands to run all of the tests.
 
-```
+```console
 make build-with-cache # or make build
 make test
 ```