Update README.md

README.md

@@ -70,4 +70,9 @@ steps:
       commands:
         - echo $MYENV # Outputs: Something
         - echo $SOMESECRET # Outputs: Whatever is saved in drone as `mysecret`
-```
+```
+
+###### Note
+If you don't want to specify single variables just use `envs:all` and all the parameters inside of `settings` will be available.
+
+All the vars will be automagically be uppercased.