diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..f359993
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,21 @@
+FROM ruby:3.1
+
+# Move it
+WORKDIR /opt
+COPY public/ ./public/
+COPY views/ ./views/
+COPY Gemfile .
+COPY config.ru .
+COPY mywillpower.rb .
+
+# Dependencies
+RUN apt-get update
+RUN apt-get -y upgrade
+RUN bundle install
+
+# Environment
+EXPOSE 4567
+
+# Send it
+CMD ["bundle", "exec", "rackup", "-o", "0.0.0.0", "-p", "4567", "-E", \
+    "production"]
diff --git a/README.md b/README.md
index 2cb7021..a80b7e3 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,22 @@
 
 Source code for http://mywillpower.org
 
-## Install dependencies
+## Local
+
+### Install dependencies
 
     bundle install
+
+### Run it locally
+
+    bundle exec mywillpower.rb
+
+## Docker
+
+### Build
+
+    docker build -t mywillpower .
+
+### Run
+
+    docker run -p 4567:4567 mywillpower
diff --git a/config.ru b/config.ru
new file mode 100644
index 0000000..9ff0472
--- /dev/null
+++ b/config.ru
@@ -0,0 +1,3 @@
+require './mywillpower'
+
+run Sinatra::Application