docs: update README

README.md

@@ -1,26 +1,4 @@
 # aws-cli-docker
-Docker image for the [AWS CLI](https://docs.aws.amazon.com/cli/latest/reference/) that runs a web server on port `9000` after running any scripts in the `init` directory to be used by a [wait-for-it](https://github.com/vishnubob/wait-for-it) script.
+Docker image for the [AWS CLI](https://docs.aws.amazon.com/cli/latest/reference/) will ensure that the credentials are available on the container before continuing with the aws-cli command.
 
-The wait-for-it script is available inside the docker image as well at `/scripts/wait-for-it.sh` to be used in your script.
-## Usage
-
-Docker:
-``` bash
-docker run -it ghcr.io/leakytap/aws-cli-docker:latest
-```
-
-Docker compose:
-``` yaml
-version: "3.5"
-services:
-  aws:
-    image: ghcr.io/leakytap/aws-cli-docker:latest
-    environment:
-      AWS_REGION: "us-west-2"
-      AWS_ACCESS_KEY_ID: key
-      AWS_SECRET_ACCESS_KEY: secret=value
-    volumes:
-      - ./init:/init
-    ports:
-      - 9000:9000
-```
+It is intended to be ran in kubernetes on EC2 instances and uses the [ec2 meta-data endpoint](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instancedata-data-retrieval.html) to function.