docs: use npx for cli instructions (#184)

Signed-off-by: Joshua Li <joshuali925@gmail.com>

Author: joshuali925

aws/cli-installer/README.md

@@ -5,7 +5,7 @@ Deploy the [Observability Stack](https://github.com/opensearch-project/observabi
 ## Quick Start
 
 ```bash
-bash -c "$(curl -fsSL https://raw.githubusercontent.com/opensearch-project/observability-stack/main/install.sh)" -- --deployment-target=aws
+npx @opensearch-project/observability-stack
 ```
 
 Takes ~15 minutes. When complete, the CLI prints a dashboard URL — open it and you're in.

docs/starlight-docs/src/content/docs/deploy/aws.mdx

@@ -16,7 +16,7 @@ Deploy the Observability Stack to AWS using managed services. This creates the s
 Interactive single-command deploy. Creates all resources, configures dashboards, and optionally launches an EC2 instance running the [OpenTelemetry Demo](https://opentelemetry.io/docs/demo/) for sample telemetry.
 
 ```bash
-bash -c "$(curl -fsSL https://raw.githubusercontent.com/opensearch-project/observability-stack/main/install.sh)" -- --deployment-target=aws
+npx @opensearch-project/observability-stack
 ```
 
 Takes ~15 minutes. See [aws/cli-installer/README.md](https://github.com/opensearch-project/observability-stack/tree/main/aws/cli-installer) for full options.

install.sh

@@ -956,16 +956,7 @@ run_aws_installer() {
         exit 1
     fi
 
-    # Clone repo and install deps
-    echo -e "  Cloning repository..."
-    TMPDIR=$(mktemp -d)
-    git clone --depth 1 "$REPO_URL" "$TMPDIR" --quiet
-    cd "$TMPDIR/aws/cli-installer"
-    npm install --silent 2>/dev/null
-
-    # Forward args to CLI
-    echo ""
-    node bin/cli-installer.mjs "${AWS_CLI_ARGS[@]}"
+    npx -y @opensearch-project/observability-stack "${AWS_CLI_ARGS[@]}"
 }
 
 main() {