diff --git a/Dockerfile.golang b/Dockerfile.golang
new file mode 100644
index 0000000..b892985
--- /dev/null
+++ b/Dockerfile.golang
@@ -0,0 +1,23 @@
+FROM golang:1.11
+
+###
+# Set up the working directory
+#
+ENV CODES_DIR /codes
+RUN mkdir -p "${CODES_DIR}"
+WORKDIR "${CODES_DIR}"
+
+###
+# Install utilities
+#
+RUN go get github.com/segmentio/terraform-docs
+
+###
+# Install codes
+#
+COPY . .
+
+###
+# What we need is.. bash!
+#
+CMD [ "bash" ]
diff --git a/README.md b/README.md
index a91e16a..1805310 100644
--- a/README.md
+++ b/README.md
@@ -48,7 +48,22 @@ resource "aws_cloudfront_distribution" "your_distribution" {
 }
 ```
 
-## License
+## Arguments and Outputs
+
+## Inputs
+
+| Name | Description | Type | Default | Required |
+|------|-------------|:----:|:-----:|:-----:|
+| basic\_auth\_credentials | Credentials for Basic Authentication. Pass a map composed of 'user' and 'password'. | map | n/a | yes |
+| function\_name | Lambda function name | string | `"basicAuth"` | no |
+
+## Outputs
+
+| Name | Description |
+|------|-------------|
+| lambda\_arn | Lambda function ARN with version |
+
+# License
 
 Copyright © 2019 Naoto Yokoyama
 
diff --git a/build.sh b/build.sh
index 23e169d..f5b5d18 100755
--- a/build.sh
+++ b/build.sh
@@ -13,4 +13,5 @@ set -o xtrace
 
 __dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 
+docker-compose build dev
 docker-compose run --rm dev npm run build
diff --git a/clean.sh b/clean.sh
index 1f1b267..beaea28 100755
--- a/clean.sh
+++ b/clean.sh
@@ -13,4 +13,5 @@ set -o xtrace
 
 __dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 
+docker-compose build dev
 docker-compose run --rm dev npm run clean
diff --git a/docker-compose.yml b/docker-compose.yml
index ecb74dd..dc8ed84 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -5,3 +5,10 @@ services:
     volumes:
       - .:/codes/
       - /codes/node_modules
+  docs:
+    build:
+      context: .
+      dockerfile: Dockerfile.golang
+    command: terraform-docs markdown table ./module
+    volumes:
+      - .:/codes/
diff --git a/docs.sh b/docs.sh
new file mode 100755
index 0000000..aeb0434
--- /dev/null
+++ b/docs.sh
@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+#
+# Generates the module markdown documents by terraform-docs.
+#
+# Usage:
+#   ./docs.sh
+#
+
+set -o errexit
+set -o nounset
+set -o pipefail
+#set -o xtrace
+
+__dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+docker-compose build docs 2>/dev/null 1>/dev/null
+docker-compose run --rm docs