feat: 支持通过环境变量自定义监控频率 (#38)

* Initial plan

* Add MONITOR_INTERVAL env variable for customizable monitoring frequency

Co-authored-by: ikxin <54543761+ikxin@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: ikxin <54543761+ikxin@users.noreply.github.com>

Author: Copilot

.env.example

@@ -1,3 +1,4 @@
 NUXT_PUBLIC_API_URL=https://kms.ikxin.com
 NUXT_PUBLIC_I18N_BASE_URL=https://kms.ikxin.com
 ENABLE_VLMCSD=false
+MONITOR_INTERVAL=10

README.en.md

@@ -76,6 +76,7 @@ The static version uses https://kms.ikxin.com API by default. You can deploy you
 | --------------------- | --------------------------- | --------------------------------------------------- |
 | `NUXT_PUBLIC_API_URL` | `https://kms.ikxin.com`     | API URL for the static version                      |
 | `MONITOR_LIST`        | `kms.org.cn,win.freekms.cn` | Custom KMS server monitoring list, separated by `,` |
+| `MONITOR_INTERVAL`    | `10`                        | Monitoring interval in seconds, default is 10       |
 | `ENABLE_VLMCSD`       | `false`                     | Whether to enable the built-in VLMCSD service       |
 
 ### Full-Stack Version

README.md

@@ -76,6 +76,7 @@ https://kms.ikxin.com
 | --------------------- | --------------------------- | ---------------------------------------- |
 | `NUXT_PUBLIC_API_URL` | `https://kms.ikxin.com`     | 静态版本 API 接口地址                    |
 | `MONITOR_LIST`        | `kms.org.cn,win.freekms.cn` | 自定义监控 KMS 服务器列表，使用 `,` 分隔 |
+| `MONITOR_INTERVAL`    | `10`                        | 监控频率，单位为秒，默认 10 秒           |
 | `ENABLE_VLMCSD`       | `false`                     | 是否启用内置 VLMCSD 服务                 |
 
 ### 全栈版本

nuxt.config.ts

@@ -1,4 +1,15 @@
 // https://nuxt.com/docs/api/configuration/nuxt-config
+
+const getMonitorCron = () => {
+  const raw = parseInt(process.env.MONITOR_INTERVAL || '10', 10)
+  const seconds = isNaN(raw) || raw <= 0 ? 10 : raw
+  if (seconds < 60) {
+    return `*/${seconds} * * * * *`
+  }
+  const minutes = Math.floor(seconds / 60)
+  return `0 */${minutes} * * * *`
+}
+
 export default defineNuxtConfig({
   compatibilityDate: '2024-11-01',
   devtools: { enabled: true },
@@ -10,7 +21,7 @@ export default defineNuxtConfig({
       tasks: true,
     },
     scheduledTasks: {
-      '0/10 * * * * *': ['monitor'],
+      [getMonitorCron()]: ['monitor'],
     },
   },
   app: {