diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..b5d4688
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,12 @@
+FROM ruby:3-bullseye
+
+RUN apt-get install gcc
+
+WORKDIR /opt
+RUN git clone --recurse-submodules https://github.com/HARICA-official/onion-csr.git
+
+WORKDIR /opt/onion-csr
+RUN gem install ffi && \
+    gcc -shared -o libed25519.so -fPIC ed25519/src/*.c
+
+CMD ["ruby", "onion-csr.rb"]