basic metrics support

src/server/routes/metrics/index.get.ts

@@ -0,0 +1,14 @@
+export default defineEventHandler(async (event) => {
+  // TODO: check password
+
+  const system = await Database.system.get();
+  if (!system.metrics.prometheus.enabled) {
+    throw createError({
+      statusCode: 400,
+      message: 'Prometheus metrics are not enabled',
+    });
+  }
+
+  setHeader(event, 'Content-Type', 'text/plain');
+  return WireGuard.getMetrics();
+});

src/server/routes/metrics/json.get.ts

@@ -0,0 +1,13 @@
+export default defineEventHandler(async () => {
+  // TODO: check password
+
+  const system = await Database.system.get();
+  if (!system.metrics.prometheus.enabled) {
+    throw createError({
+      statusCode: 400,
+      message: 'Prometheus metrics are not enabled',
+    });
+  }
+
+  return WireGuard.getMetricsJSON();
+});