fix: add hosts file to runc (#1386)

<!-- Please make sure there is an issue that this PR is correlated to. -->
Fixes RVT-4074
## Changes

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packages/infra/client/manager/src/actor/oci_config.rs

@@ -244,7 +244,13 @@ fn mounts(opts: &ConfigOpts) -> Result<serde_json::Value> {
 			"type": "bind",
 			"source": opts.actor_path.join("resolv.conf").to_str().context("resolv.conf path")?,
 			"options": ["rbind", "rprivate"]
-		}
+		},
+		{
+			"destination": "/etc/hosts",
+			"type": "bind",
+			"source": opts.actor_path.join("hosts").to_str().context("hosts path")?,
+			"options": ["rbind", "rprivate"]
+		},
 	]))
 }
 

packages/infra/client/manager/src/actor/setup.rs

@@ -297,7 +297,7 @@ impl Actor {
 
 		// resolv.conf
 		//
-		// See also rivet-job.conflist in lib/bolt/core/src/dep/terraform/install_scripts/files/nomad.sh
+		// See also rivet-actor.conflist in packages/services/cluster/src/workflows/server/install/install_scripts/files/pegboard_configure.sh
 		fs::write(
 			actor_path.join("resolv.conf"),
 			indoc!(
@@ -314,6 +314,18 @@ impl Actor {
 		)
 		.await?;
 
+		// hosts
+		fs::write(
+			actor_path.join("hosts"),
+			indoc!(
+				"
+				127.0.0.1	localhost
+				::1			localhost ip6-localhost ip6-loopback
+				"
+			),
+		)
+		.await?;
+
 		Ok(())
 	}
 

packages/infra/client/manager/src/runner.rs

@@ -1,5 +1,4 @@
 use std::{
-	io::Write,
 	os::unix::process::CommandExt,
 	path::{Path, PathBuf},
 	process::Stdio,