docs: add README

Author: HarshCasper

README.md

@@ -1,2 +1,63 @@
-# setup-localstack
-Sets up LocalStack CLI in your GitHub Actions workflow ☁️
+# Setup LocalStack
+
+[![LocalStack Test](https://github.com/HarshCasper/setup-localstack/actions/workflows/ci.yml/badge.svg)](https://github.com/HarshCasper/setup-localstack/actions/workflows/ci.yml)
+
+
+A GitHub Action to setup [LocalStack](https://github.com/localstack/localstack) on your GitHub Actions runner workflow by:
+
+- Pulling a specific version of the LocalStack Docker Image into the GitHub Action runner.
+- Configuring the [LocalStack CLI](https://docs.localstack.cloud/get-started/#localstack-cli) to launch the Docker container with an optional API token for pro usage.
+- Installing [LocalStack AWS CLI](https://github.com/localstack/awscli-local), a thin wrapper around the `aws` command line interface for use with LocalStack to run integration tests over AWS services.
+
+## Usage
+
+To get started, you can use this minimal example:
+
+```yml
+- name: Start LocalStack
+  uses: HarshCasper/[email protected]
+  with:
+    image-tag: 'latest'
+    install-awslocal: 'true'
+  env:
+    LOCALSTACK_API_KEY: ${{ secrets.LOCALSTACK_API_KEY }}
+```
+
+### Inputs
+
+|Input|Description  |Default
+|--|--|--|
+|`image-tag`  |Tag of the LocalStack Docker image to use  |`latest`
+|`install-awslocal`  |Whether to install the `awslocal` CLI into the build environment  | `true`
+
+### Example workflow
+
+```yml
+name: LocalStack Test
+on: [ push, pull_request ]
+
+jobs:
+  localstack-action-test:
+    name: 'Test LocalStack GitHub Action'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Start LocalStack
+        uses: HarshCasper/[email protected]
+        with:
+          image-tag: 'latest'
+          install-awslocal: 'true'
+        env:
+          LOCALSTACK_API_KEY: ${{ secrets.LOCALSTACK_API_KEY }}
+
+      - name: Run Tests against LocalStack
+        run: |
+          awslocal s3 mb s3://test
+          awslocal s3 ls
+          echo "Test Execution complete!" 
+```
+
+## License
+
+[MIT License](https://github.com/HarshCasper/validate-issues-over-pull-requests/blob/main/LICENSE)