Updates .gitignore and examples config file

Adds runtime/logs to the .gitignore and updates the config example with
enabling the jailer.

Signed-off-by: xibz <[email protected]>

Author: xibz

.gitignore

@@ -1,3 +1,4 @@
 .idea/
 bin/
+runtime/logs
 *stamp

examples/etc/containerd/firecracker-runtime.json

@@ -5,5 +5,8 @@
   "root_drive": "/var/lib/firecracker-containerd/runtime/default-rootfs.img",
   "cpu_count": 1,
   "cpu_template": "T2",
-  "log_level": "Debug"
+  "log_level": "Debug",
+  "jailer": {
+    "runc_binary_path": "/usr/local/bin/runc"
+  }
 }