Remove hardcoded list of relays

Now we use RELAY env var

.env-sample

@@ -1,2 +1,6 @@
+# User private key in nsec format
 NSEC_PRIVKEY='nsec1...'
-MOSTRO_PUBKEY='npub1...'
+# Mostro pubkey in npub format
+MOSTRO_PUBKEY='npub1...'
+# Comma-separated list of relays
+RELAYS='wss://relay.nostr.vision,wss://nostr.zebedee.cloud,wss://nostr.slothy.win,wss://nostr.rewardsbunny.com,wss://nostr.supremestack.xyz,wss://nostr.shawnyeager.net,wss://relay.nostrmoto.xyz,wss://nostr.roundrockbitcoiners.com'

src/util.rs

@@ -45,29 +45,8 @@ pub async fn connect_nostr() -> Result<Client> {
 
     // Create new client
     let client = Client::new(&my_keys);
-
-    let relays = vec![
-        "wss://relay.nostr.vision",
-        "wss://nostr.zebedee.cloud",
-        "wss://nostr.slothy.win",
-        "wss://nostr.rewardsbunny.com",
-        "wss://nostr.supremestack.xyz",
-        "wss://nostr.shawnyeager.net",
-        "wss://relay.nostrmoto.xyz",
-        "wss://nostr.roundrockbitcoiners.com",
-        "wss://nostr.utxo.lol",
-        "wss://nostr-relay.schnitzel.world",
-        "wss://sg.qemura.xyz",
-        "wss://nostr.digitalreformation.info",
-        "wss://nostr-relay.usebitcoin.space",
-        "wss://nostr.bch.ninja",
-        "wss://nostr.massmux.com",
-        "wss://nostr-pub1.southflorida.ninja",
-        "wss://relay.nostr.nu",
-        "wss://nostr.easydns.ca",
-        "wss://nostrical.com",
-        "wss://relay.damus.io",
-    ];
+    let relays = var("RELAYS").expect("RELAYS is not set");
+    let relays = relays.split(',').collect::<Vec<&str>>();
 
     // Add relays
     for r in relays.into_iter() {