Added function to create file for database if one does not exist

src/main.rs

@@ -1,6 +1,8 @@
 mod cli;
 mod db;
 
+use std::{fs::File, path::Path};
+
 use anyhow::anyhow;
 use clap::Parser;
 use cli::Cli;
@@ -16,6 +18,15 @@ async fn main() -> Result<()> {
              Please provide one with the BOOKMARK_DB_PATH environment \
              variable.".to_string()
         ))?;
+    create_if_not_exists(&location)?;
     let store = db::Store::new(&location, cli.is_reading_list).await?;
     cli.run(store).await
 }
+
+fn create_if_not_exists(path_string: &str) -> Result<()> {
+    let path = Path::new(path_string);
+    if !path.is_file() {
+        File::create(path)?;
+    }
+    Ok(())
+}