fix: update LocalStack license requirement and standardize CI workflow (#11)

- Add auth guard to Makefile start target
- Add license bullet and update start section in README
- Upgrade checkout@v3→v4, setup-node@v3→v4, Node 18→22 in CI workflow
- Replace LOCALSTACK_API_KEY with LOCALSTACK_AUTH_TOKEN

Author: HarshCasper

.github/workflows/main.yml

@@ -20,30 +20,30 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Setup Python
         uses: actions/setup-python@v4
         with:
           python-version: '3.9'
 
       - name: Setup Nodejs
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version: 22
 
       - name: Install dependencies
         run: |
           make install
 
       - name: Start LocalStack
         env:
-          LOCALSTACK_API_KEY: ${{ secrets.LOCALSTACK_API_KEY }}
+          LOCALSTACK_AUTH_TOKEN: ${{ secrets.LOCALSTACK_AUTH_TOKEN }}
           DNS_ADDRESS: 0
         run: |
           docker pull localstack/localstack-pro:latest
           # Start LocalStack in the background
-          DEBUG=1 localstack start -d
+          DEBUG=1 LOCALSTACK_AUTH_TOKEN=$LOCALSTACK_AUTH_TOKEN localstack start -d
           # Wait 30 seconds for the LocalStack container to become ready before timing out
           echo "Waiting for LocalStack startup..."
           localstack wait -t 15

Makefile

@@ -16,8 +16,9 @@ install:     ## Install dependencies
 run:         ## Deploy the app locally and run an AppSync GraphQL test invocation
 	./run.sh
 
-start:
-	localstack start -d
+start:		## Start LocalStack
+	@test -n "${LOCALSTACK_AUTH_TOKEN}" || (echo "LOCALSTACK_AUTH_TOKEN is not set. Find your token at https://app.localstack.cloud/workspace/auth-token"; exit 1)
+	@LOCALSTACK_AUTH_TOKEN=$(LOCALSTACK_AUTH_TOKEN) localstack start -d
 
 stop:
 	@echo

README.md

@@ -27,21 +27,23 @@ We are using the following AWS services and third-party integrations to build ou
 
 ## Prerequisites
 
-- LocalStack Pro with the [`localstack` CLI](https://docs.localstack.cloud/getting-started/installation/#localstack-cli).
+- A valid [LocalStack for AWS license](https://localstack.cloud/pricing). Your license provides a [`LOCALSTACK_AUTH_TOKEN`](https://docs.localstack.cloud/getting-started/auth-token/) to activate LocalStack.
+- [`localstack` CLI](https://docs.localstack.cloud/getting-started/installation/#localstack-cli).
 - [AWS CLI](https://docs.localstack.cloud/user-guide/integrations/aws-cli/) with the [`awslocal` wrapper](https://docs.localstack.cloud/user-guide/integrations/aws-cli/#localstack-aws-cli-awslocal).
 - [Python](https://www.python.org/downloads/)
 - [`cURL`](https://curl.se/)
 - [`wscat`](https://github.com/websockets/wscat)
 
-Start LocalStack Pro with the `LOCALSTACK_AUTH_TOKEN` pre-configured:
+## Start LocalStack
+
+Start LocalStack with the `LOCALSTACK_AUTH_TOKEN` pre-configured:
 
 ```sh
 export LOCALSTACK_AUTH_TOKEN=<your-auth-token>
-localstack start
+make start
+make ready
 ```
 
-> If you prefer running LocalStack in detached mode, you can add the `-d` flag to the `localstack start` command, and use Docker Desktop to view the logs.
-
 ## Instructions
 
 You can build and deploy the sample application on LocalStack by running our `Makefile` commands. Run `make install` to install the dependencies and `make run` to create the infrastructure on LocalStack. Run `make stop` to delete the infrastructure by stopping LocalStack.