Fix push-mode address configuration regressions

Author: cursoragent

src/main.rs

@@ -196,7 +196,7 @@ async fn main() -> Result<(), Error> {
         let config = config.clone();
 
         async move {
-            let addr = format!("0.0.0.0:{}", config.grpc_port)
+            let addr = format!("{}:{}", config.grpc_addr, config.grpc_port)
                 .parse()
                 .expect("Failed to parse address");
 

src/push.rs

@@ -57,11 +57,11 @@ impl PushPool {
     pub async fn start(&self) -> Result<()> {
         let mut handles = vec![];
 
-        for _ in 0..self.config.push_threads {
+        for _ in 0..self.config.push_threads.max(1) {
             let endpoint = self.config.worker_endpoint.clone();
 
             let callback_url = format!(
-                "{}:{}",
+                "http://{}:{}",
                 self.config.callback_addr, self.config.callback_port
             );