[DOC] Enhance documentation in readme

.env.TEMPLATE

@@ -1,5 +1,5 @@
 # A comma separated list of actions to allow, default: .deploy
-ACINT_ACTIONS=
+ACINT_ALLOWED_ACTIONS=
 
 # The proxy path for the service, default: /acint
 ACINT_PROXY_PATH=

README.md

@@ -1,3 +1,23 @@
 # Action Interface (actint)
 
-The Action Interface (actint) is a simple service that touches a file for the called action. For example if the action `deploy` is called
+The Action Interface (actint) is a simple service that touches a file for the called action. 
+For example if the action `.deploy` is called it touches a file into the `/do` folder inside 
+the docker container.
+
+## Environment
+
+### `ACINT_ALLOWED_ACTIONS`
+
+A comma separated list of actions to allow, default: .deploy
+
+```bash
+ACINT_ALLOWED_ACTIONS=.deploy
+```
+
+### `ACINT_PROXY_PATH`
+
+The proxy path for the service, default: /acint
+
+```bash
+ACINT_PROXY_PATH=/acint
+```