docs: add scheduled builds info and update examples

Author: byCedric

base/README.md

@@ -4,6 +4,7 @@
 
 A prebuilt docker image to use the [Expo CLI][link-expo-cli] on Docker-based environments.
 This image contains all necessary libraries to perform all commands of the CLI.
+To make sure this image stays up to date, Travis CI is scheduled to run weekly builds.
 
 - Based on `node:10` image
 - Contains globally installed `expo-cli@2`
@@ -17,10 +18,10 @@ When nothing is provided, it will output the help information provided by the CL
 > The entry point uses `sh -c` to invoke Expo, making environment variables available to that command.
 
 ```bash
-$ docker run --rm bycedric/ci-expo
-$ docker run --rm bycedric/ci-expo pubish
-$ docker run --rm -ti bycedric/ci-expo login
-$ docker run --rm -ti --entrypoint sh bycedric/ci-expo
+$ docker run --rm bycedric/expo-cli
+$ docker run --rm bycedric/expo-cli pubish
+$ docker run --rm -ti bycedric/expo-cli login
+$ docker run --rm -ti --entrypoint sh bycedric/expo-cli
 ```
 
 > This image is intended to use on Docker-based CI environments, see [the Expo CI guide][link-expo-cicd] to get started.