Adding GH Actions and fixing linter

Author: elamaran11

docs/patterns/single-new-eks-observability-accelerators/single-new-eks-opensource-observability.md

@@ -57,6 +57,9 @@ export COA_AMG_WORKSPACE_ID=g-xxx
 export COA_AMG_ENDPOINT_URL=https://g-xyz.grafana-workspace.us-east-1.amazonaws.com
 ```
 
+!!! warning
+    Setting up environment variables `COA_AMG_ENDPOINT_URL` and `AWS_REGION` is mandatory for successful execution of this pattern.
+
 4. GRAFANA API KEY: Amazon Managed Grafana provides a control plane API for generating Grafana API keys.
 
 ```bash

lib/single-new-eks-opensource-observability-construct/index.ts

@@ -23,7 +23,6 @@ export default class SingleNewEksOpenSourceobservabilityConstruct {
         const ampPrometheusEndpoint = (blueprints.getNamedResource(ampWorkspaceName) as unknown as amp.CfnWorkspace).attrPrometheusEndpoint;
 
         const amgEndpointUrl = process.env.COA_AMG_ENDPOINT_URL;
-        assert(amgEndpointUrl, 'The "COA_AMG_ENDPOINT_URL" environment variable needs to be populated with AMG URL Endpoint');
 
         // All Grafana Dashboard URLs from `cdk.json` if present
         const clusterDashUrl: string = utils.valueFromContext(scope, "cluster.dashboard.url", clusterDefaultDashUrl);