fix: Initialize DB when it doesn't exist

src/db/filesystem.rs

@@ -47,6 +47,22 @@ pub struct FilesystemDatabase {
 impl FilesystemDatabase {
     pub async fn from_path(path: impl AsRef<Utf8Path>) -> Result<Database, BoxedError> {
         let path = path.as_ref();
+
+        if !tokio::fs::try_exists(path)
+            .await
+            .map_err(|e| Box::new(FilesystemDatabaseError::ReadFileIO(path.to_path_buf(), e)))?
+        {
+            // The database doesn't exist yet, we create an empty one and try to write it
+            // to make sure the permissions are correct and the destination folder exists.
+            let mut db = Self {
+                inner: MemoryDatabase::default(),
+                path: path.to_path_buf(),
+            };
+
+            db.save().await?;
+            return Ok(Database::new(db));
+        }
+
         let s = tokio::fs::read(path)
             .await
             .map_err(|e| Box::new(FilesystemDatabaseError::ReadFileIO(path.to_path_buf(), e)))?;