[TryMOSK] Make Apt configuration in a separate script

Related-Prod: PRODX-53424
Change-Id: I00191ccaaaebaaeafdc054d108bd82cb9b921d26
diff --git a/trymos/image_build/template.json b/trymos/image_build/template.json
index db18625..eb2de6a 100644
--- a/trymos/image_build/template.json
+++ b/trymos/image_build/template.json
@@ -37,6 +37,12 @@
     },
     {
       "type": "shell",
+      "scripts": [
+         "scripts/apt-configure.sh"
+      ]
+    },
+    {
+      "type": "shell",
       "inline": [
          "/srv/trymosk/image_build/build-image.sh",
          "rm -rf /srv/trymosk/image_build"