Add release binary and ensure public IP isn't set to loopback (solana…

…-labs#104)

README.md

@@ -19,7 +19,7 @@ Next, check out the master branch of the jito-relayer repo and
 ensure you're on the latest commit.
 In the master branch, run the following command and follow the instructions:
 ```shell
-$ cargo workspaces version --all
+$ ./release
 ```
 This will bump all the versions of the packages in your repo, 
 push to master and tag a new commit.

release

@@ -0,0 +1,2 @@
+#!/usr/bin/env sh
+cargo workspaces version --all --exact --no-individual-tags

transaction-relayer/src/main.rs

@@ -268,6 +268,10 @@ fn main() {
     please find your public ip address and pass it in on the command line",
         public_ip
     );
+    assert!(
+        !public_ip.is_loopback(),
+        "Your public IP can't be the loopback interface"
+    );
 
     // Supporting IPV6 addresses is a DOS vector since they are cheap and there's a much larger amount of them.
     // The DOS is specifically with regards to the challenges queue filling up and starving other legitimate