feat: enhance network configuration handling in updater script

- Improved network mode handling by introducing a variable for network names, allowing for better management of custom networks.
- Added support for network aliases, enabling the specification of multiple aliases for a given network in the snapshot.
- Enhanced health check logging to include the last HTTP status received, providing better visibility into health check failures.

deploy/updater/entrypoint.sh

@@ -248,19 +248,30 @@ build_run_args_from_snapshot() {
   ' "$snapshot_file")
 
   local network_mode
+  local network_name=""
   network_mode="$(jq -r '.HostConfig.NetworkMode // empty' "$snapshot_file")"
   if [[ "$network_mode" == "host" ]]; then
     args+=(--network host)
   elif [[ -n "$network_mode" && "$network_mode" != "default" && "$network_mode" != "bridge" ]]; then
-    args+=(--network "$network_mode")
+    network_name="$network_mode"
+    args+=(--network "$network_name")
   else
-    local custom_network
-    custom_network="$(jq -r '.NetworkSettings.Networks // {} | keys[0] // empty' "$snapshot_file")"
-    if [[ -n "$custom_network" && "$custom_network" != "bridge" ]]; then
-      args+=(--network "$custom_network")
+    network_name="$(jq -r '.NetworkSettings.Networks // {} | keys[0] // empty' "$snapshot_file")"
+    if [[ -n "$network_name" && "$network_name" != "bridge" ]]; then
+      args+=(--network "$network_name")
     fi
   fi
 
+  if [[ -n "$network_name" ]]; then
+    while IFS= read -r alias; do
+      [[ -n "$alias" ]] || continue
+      args+=(--network-alias "$alias")
+    done < <(jq -r --arg net "$network_name" '
+      .NetworkSettings.Networks[$net].Aliases // []
+      | .[]
+    ' "$snapshot_file")
+  fi
+
   if [[ "$(jq -r '.HostConfig.Privileged // false' "$snapshot_file")" == "true" ]]; then
     args+=(--privileged)
   fi
@@ -289,11 +300,13 @@ wait_for_health() {
   local health_url="$3"
   local expect_status="$4"
   local deadline=$((SECONDS + HEALTH_TIMEOUT_SECONDS))
+  local last_status=""
 
   while (( SECONDS < deadline )); do
     if [[ "$health_type" == "http" ]]; then
       local status
       status="$(curl --silent --output /dev/null --write-out '%{http_code}' --max-time 5 "$health_url" || true)"
+      last_status="$status"
       if [[ "$status" == "$expect_status" ]]; then
         log info "target=${target_id} action=health_ok status=${status}"
         return 0
@@ -305,7 +318,7 @@ wait_for_health() {
     sleep 2
   done
 
-  log error "target=${target_id} action=health_fail reason=timeout seconds=${HEALTH_TIMEOUT_SECONDS}"
+  log error "target=${target_id} action=health_fail reason=timeout seconds=${HEALTH_TIMEOUT_SECONDS} url=${health_url} last_status=${last_status:-none}"
   return 1
 }