docs: update README with new repository link and docker instructions

Update the Palladium Full Node repository link and improve Docker Compose configuration details.
Add note about host.docker.internal usage and clarify exposed ports for ElectrumX.

README.md

@@ -8,7 +8,7 @@ Tested on:
 * ✅ Debian 12
 * ✅ Ubuntu 24.04
 
-🔗 Palladium Full Node: [NotRin7/Palladium](https://github.com/NotRin7/Palladium)
+🔗 Palladium Full Node: [davide3011/palladiumcore](https://github.com/davide3011/palladiumcore)
 
 ---
 
@@ -53,16 +53,21 @@ In the `docker-compose.yml` file, you can set the RPC credentials of the Palladi
 
 ```yaml
 environment:
-  - DAEMON_URL=http://<rpcuser>:<rpcpassword>@<host>:<port>/
+  DAEMON_URL: "http://<rpcuser>:<rpcpassword>@host.docker.internal:<port>/"
 ```
 
 Replace with your actual values:
 
 * `<rpcuser>` → RPC username of the node
 * `<rpcpassword>` → RPC password of the node
-* `<host>` → node address (e.g., `127.0.0.1`)
 * `<port>` → RPC port of the node (e.g., `2332` for Palladium)
 
+**Note:** The compose uses `host.docker.internal` to connect to the Palladium node running on your host machine (outside the container). This works on both Windows/Mac and Linux thanks to the `extra_hosts` configuration.
+
+**Ports:** ElectrumX exposes:
+- `50001` → TCP (unencrypted)
+- `50002` → SSL (encrypted, recommended)
+
 **Important:** never include real credentials in files you upload to GitHub.
 
 ---