update upgrade documentation and migration example for clarity

UPGRAD.md

@@ -2,7 +2,7 @@
 
 > [!CAUTION]
 > 1. You **cannot** upgrade directly from v0.7.x to v0.9.x. You must first upgrade to v0.8.x, then to v0.9.x.
-> 2. Always back up your database before performing an upgrade.
+> 2. Always back up your database before performing an upgrade and stop the running instance of Freedit.
 > 3. Please view the upgrade examples in the [`examples/`](examples/) directory for more details.
 > 4. You need to have Rust installed to run the upgrade scripts. Install Rust from [here](https://www.rust-lang.org/tools/install).
 
@@ -14,7 +14,9 @@ Change the underlying database from sled to fjall.
 
 #### How?
 
-`cargo run --example v0_8-v0_9`
+1. `cargo run --example v0_8-v0_9 -- <path to v0.8 db>`
+2. Set db path to the new db file in `config.toml` file.
+3. Replace the old binary with the new binary.
 
 ### Upgrading from v0.7.x to v0.8.x
 
@@ -27,5 +29,8 @@ A lot of technical debt has been paid off in v0.8.x, including:
 
 #### How?
 
-`cargo run --example v0_7-v0_8 -- <path to v0.7 db>`
+1. `cargo run --example v0_7-v0_8 -- <path to v0.7 db>`
+2. Add `podcast_path = "data/podcasts"` and `snapshots_path = "data/snapshots"` in config.toml file.
+3. Set db path to the new db file in `config.toml` file.
+4. Replace the old binary with the new binary.
 

examples/v0_7-v0_8.rs

@@ -6,15 +6,14 @@ use serde::Serialize;
 use std::collections::HashMap;
 
 fn main() {
-    let db_url = std::env::args()
-        .nth(1)
-        .unwrap_or_else(|| "freedit.db".to_owned());
+    let db_url = std::env::args().nth(1).unwrap();
 
     // check if file exists
     if !std::path::Path::new(&db_url).exists() {
         panic!("Database file {} does not exist", db_url);
     }
 
+    println!("Starting migration from v0.7 to v0.8...");
     let config = sled::Config::default().path(db_url);
     let db = config.open().unwrap();