add axiom example

examples/axiom-webhook/README.md

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+# Axiom Webhook
+
+This example creates a webhook handler for [Axiom](https://axiom.co) that sends a new chat message when a [monitor](https://axiom.co/docs/monitor-data/monitors#custom-webhook) is triggered or resolved.
+
+_This code is provided as an example and is not intended to be deployed as-is. Adapt the code in `src/index.ts` to fit your use case and deployment environment._
+
+### Prerequisites
+
+A `CAMPSITE_API_KEY` environment variable is required.
+
+Additionally, [follow these steps](https://axiom.co/docs/monitor-data/monitors#custom-webhook) to create a custom webhook notifier in Axiom.

examples/axiom-webhook/package.json

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+{
+  "name": "axiom-webhook",
+  "version": "1.0.0",
+  "scripts": {
+    "clean": "rm -rf .turbo node_modules",
+    "format": "prettier --write \"**/*.{ts,md,yml,json}\""
+  },
+  "dependencies": {
+    "dotenv": "^16.4.5"
+  },
+  "devDependencies": {
+    "@types/node": "^20.16.5",
+    "ts-node": "^10.9.2",
+    "ts-node-dev": "^2.0.0",
+    "typescript": "^5.5.4"
+  }
+}

examples/axiom-webhook/src/index.ts

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+const CAMPSITE_API_KEY = process.env.CAMPSITE_API_KEY
+const CAMPSITE_ALERTS_THREAD_ID = 'sdcup465jb7y'
+
+export default async function server(request: Request): Promise<Response> {
+  if (request.method !== 'POST') {
+    return new Response('Method not allowed', { status: 405 })
+  }
+
+  const payload = await request.json()
+
+  // Modify this to suit your needs, e.g. for threshold alerts vs. match alerts
+  const status = payload.action === 'Open' ? '🔴 Monitor triggered' : '🟢 Monitor resolved'
+
+  const message = `**${status}: ${payload.event.title}**\n${payload.event.body}`
+
+  try {
+    const campsiteResponse = await fetch(`https://api.campsite.com/v2/threads/${CAMPSITE_ALERTS_THREAD_ID}/messages`, {
+      method: 'POST',
+      headers: {
+        'Content-Type': 'application/json',
+        Authorization: `Bearer ${CAMPSITE_API_KEY}`
+      },
+      body: JSON.stringify({
+        content_markdown: message
+      })
+    })
+
+    if (!campsiteResponse.ok) {
+      throw new Error(`Campsite API error: ${campsiteResponse.statusText}`)
+    }
+
+    return new Response('OK', { status: 200 })
+  } catch (error) {
+    console.error('Error posting to Campsite:', error)
+    return new Response('Error posting to Campsite', { status: 500 })
+  }
+}

examples/axiom-webhook/tsconfig.json

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+{
+  "extends": "../../tsconfig.json"
+}