diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index 69a6797..61d631a 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -1,6 +1,11 @@
 {
   "name": "Fluentular Dev Environment",
   "image": "mcr.microsoft.com/devcontainers/ruby:4",
+  "features": {
+    "ghcr.io/devcontainers/features/docker-in-docker:3": {
+      "moby": false
+    }
+  },
   "containerEnv": {
     "BUNDLE_PATH": "/usr/local/bundle",
     "TZ": "Asia/Tokyo"
diff --git a/Procfile b/Procfile
new file mode 100644
index 0000000..084e451
--- /dev/null
+++ b/Procfile
@@ -0,0 +1 @@
+web: bundle exec rackup --host 0.0.0.0 -p ${PORT}
diff --git a/heroku.yml b/heroku.yml
deleted file mode 100644
index fa5723e..0000000
--- a/heroku.yml
+++ /dev/null
@@ -1,6 +0,0 @@
-build:
-  languages:
-    - ruby
-
-run:
-  web: bundle exec rackup config.ru -p ${PORT}