Create cron-syntax.mdx

src/content/docs/knowledge-base/cron-syntax.mdx

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+---
+title: "Supported Cron Syntax"
+head:
+  - tag: "meta"
+    attrs:
+        property: "og:title"
+        content: "Supported Cron Syntax for Coolify"
+description: "An overview of the supported cron syntax for Coolify."
+---
+
+Coolify supports scheduling automated tasks like cleanups, backups, and more using cron syntax.
+
+## Supported Syntax
+
+### Standard Cron Format
+Coolify supports the complete standard cron syntax format (`* * * * *`).
+
+### Predefined Schedules
+For convenience, Coolify also supports the following predefined schedule strings:
+
+#### Without @ Prefix
+- `every_minute` - Runs every minute
+- `hourly` - Runs once per hour
+- `daily` - Runs once per day
+- `weekly` - Runs once per week
+- `monthly` - Runs once per month
+- `yearly` - Runs once per year
+
+#### With @ Prefix
+- `@every_minute` - Runs every minute
+- `@hourly` - Runs once per hour
+- `@daily` - Runs once per day
+- `@weekly` - Runs once per week
+- `@monthly` - Runs once per month
+- `@yearly` - Runs once per year