diff --git a/ansible/files/home/signer/webhook/.keep b/ansible/files/home/signer/webhook/.keep
deleted file mode 100644
index e69de29..0000000
diff --git a/ansible/files/home/signer/webhook/Gemfile b/ansible/files/home/signer/webhook/Gemfile
new file mode 100644
index 0000000..e965cf0
--- /dev/null
+++ b/ansible/files/home/signer/webhook/Gemfile
@@ -0,0 +1,3 @@
+source "https://rubygems.org"
+
+gem "rack"
diff --git a/ansible/files/home/signer/webhook/config.ru b/ansible/files/home/signer/webhook/config.ru
new file mode 100644
index 0000000..bdf9984
--- /dev/null
+++ b/ansible/files/home/signer/webhook/config.ru
@@ -0,0 +1,24 @@
+# Copyright (C) 2024  Kodama Takuya <otegami@clear-code.com>
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+require "pathname"
+
+base_dir = Pathname(__FILE__).dirname
+lib_dir = base_dir + "lib"
+
+$LOAD_PATH.unshift(lib_dir.to_s)
+
+run WebhookSigner::App.new
diff --git a/ansible/files/home/signer/webhook/lib/webhook-signer/app.rb b/ansible/files/home/signer/webhook/lib/webhook-signer/app.rb
new file mode 100644
index 0000000..c1a1739
--- /dev/null
+++ b/ansible/files/home/signer/webhook/lib/webhook-signer/app.rb
@@ -0,0 +1,23 @@
+# Copyright (C) 2024  Kodama Takuya <otegami@clear-code.com>
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+module WebhookSigner
+  class App
+    def call(env)
+      [200, {}, ["Hello Webhook Signer"]]
+    end
+  end
+end