+Expose a directory inside the host to the container.
+
+#### links:
+
+```yaml
+links:
+ - link:
+ name: postgres
+ alias: postgres
+```
+
+Links another container to the current container. This will add `--link postgres:postgres`
+to the options when running the container.
+
+#### environment variables:
+
+Setting environment variables to the current container.
+
+```yaml
+# app.yml
+
+env:
+ DISCOURSE_DB_HOST: some-host
+ DISCOURSE_DB_NAME: "{{config}}_discourse"
+```
+
+The above will add `-e DISCOURSE_DB_HOST=some-host -e DISCOURSE_DB_NAME=app_discourse` to the options when running the container.
+
+#### labels:
+
+```yaml
+# app.yml
+
+labels:
+ monitor: "true"
+ app_name: "{{config}}_discourse"
+```
+
+Add labels to the current container. The above will add `--l monitor=true -l app_name=dev_discourse` to the options
+when running the container