feat(cron::update) auto update git repo and update db index

backend/markdown/src/error.rs

@@ -0,0 +1,16 @@
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+pub enum Error {
+    #[error("missing front-matter field: id")]
+    MissingID,
+
+    #[error("invalid file id: {}", msg)]
+    InvalidID { msg: String },
+
+    #[error("invalid front-matter: {}", msg)]
+    InvalidFrontMatter { msg: String },
+
+    #[error("fs error: {}", msg)]
+    FSError { msg: String },
+}