diff --git a/README.md b/README.md
index 5314d80..d839ca9 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,6 @@
 ![Build and Publish Docker](https://github.com/junkurihara/rust-rpxy/actions/workflows/docker_build_push.yml/badge.svg)
 ![ShiftLeft Scan](https://github.com/junkurihara/rust-rpxy/actions/workflows/shift_left.yml/badge.svg)
 
-
 **WIP Project**
 
 ## Introduction
diff --git a/config-example.toml b/config-example.toml
index 4e26faf..8032962 100644
--- a/config-example.toml
+++ b/config-example.toml
@@ -29,39 +29,46 @@ default_app = 'another_localhost'
 ###################################
 #         Backend settings        #
 ###################################
-[application]
+[apps]
 
+######################################################################
+## Registering a backend app served by a domain name "localhost"
 [apps.localhost]
-server_name = 'localhost'
-reverse_proxy = [
-  # default destination if path is not specified
-  # Array for load balancing
-  { upstream = [
-    { location = 'www.yahoo.com', tls = true },
-    { location = 'www.yahoo.co.jp', tls = true },
-  ], upstream_options = [
-    "override_host",
-  ] },
-  { path = '/maps', upstream = [
-    { location = 'www.bing.com', tls = true },
-    { location = 'www.bing.co.jp', tls = true },
-  ], upstream_options = [
-    "override_host",
-    "upgrade_insecure_requests",
-  ] },
-]
+server_name = 'localhost' # Domain name
+
 # Optional: TLS setting. if https_port is specified and tls is true above, this must be given.
 tls = { https_redirection = true, tls_cert_path = '/certs/localhost.crt', tls_cert_key_path = '/certs/localhost.key' } # for docker volume mounted certs
 #tls = { https_redirection = true, tls_cert_path = './localhost.crt', tls_cert_key_path = './localhost.key' }          # for local
 
-
-## List of destinations to send data to.
-## At this point, round-robin is used for load-balancing if multiple URLs are specified.
+## TODO
 # allowhosts = ['127.0.0.1', '::1', '192.168.10.0/24'] # TODO
 # denyhosts = ['*'] # TODO
+
+# default destination if "path" is not specified
+[[apps.localhost.reverse_proxy]]
+# List of destinations to send data to. At this point, round-robin is used for load-balancing if multiple URLs are specified.
+upstream = [
+  { location = 'www.yahoo.com', tls = true },
+  { location = 'www.yahoo.co.jp', tls = true },
+]
+upstream_options = ["override_host"]
+
+# Non-default destination in "localhost" app, which is routed by "path"
+[[apps.localhost.reverse_proxy]]
+path = '/maps'
+upstream = [
+  { location = 'www.bing.com', tls = true },
+  { location = 'www.bing.co.jp', tls = true },
+]
+upstream_options = ["override_host", "upgrade_insecure_requests"]
+######################################################################
+
+######################################################################
+# Another application backend servied by different domain name
 [apps.another_localhost]
 server_name = 'localhost.localdomain'
 reverse_proxy = [{ upstream = [{ location = 'www.google.com', tls = true }] }]
+######################################################################
 
 ###################################
 #      Experimantal settings      #