diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..29818c9
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,19 @@
+services:
+  - docker
+
+before_install:
+- openssl aes-256-cbc -K $encrypted_9157553ce13c_key -iv $encrypted_9157553ce13c_iv -in .travis/travis.enc -out ~/.ssh/id_rsa -d
+- chmod 600 ~/.ssh/id_rsa
+- git config --global user.name "Changkun Ou"
+- git config --global user.email "hi@changkun.us"
+- make build-env
+
+addons:
+  ssh_known_hosts:
+  - changkun.de
+
+script:
+  - make build
+
+after_success:
+  scp -r website/public/modern-cpp/* $encrypted_server_user@changkun.de:$encrypted_server_path
diff --git a/.travis/travis.enc b/.travis/travis.enc
new file mode 100644
index 0000000..220056d
Binary files /dev/null and b/.travis/travis.enc differ
diff --git a/Makefile b/Makefile
index 5bc73e6..a0b76f0 100644
--- a/Makefile
+++ b/Makefile
@@ -1,12 +1,26 @@
-all: pdf website
+DOCKER_ENV=changkun/modern-cpp-tutorial:build-env
+LANGS = zh-cn en-us
+ALL_BUILDS = pdf website
 
-pdf:
-	cd pdf/zh-cn && make
-	cd pdf/en-us && make
+# dep
+
+all: $(ALL_BUILDS)
+
+pdf: $(LANGS)
+$(LANGS):
+	cd pdf/$@ && make && make clean
 
 website:
 	cd website && make
 
+build:
+	docker run --rm -v `pwd`:/modern-cpp-tutorial -it $(DOCKER_ENV) make 
+
+# dev
+
+build-env:
+	docker build -t $(DOCKER_ENV) -f ./docker/Dockerfile .
+
 serve:
 	cd website && make s
 
@@ -14,5 +28,7 @@ clean:
 	cd pdf/zh-cn && make clean
 	cd pdf/en-us && make clean
 	cd website && make clean
+	docker images -f "dangling=true" -q | xargs docker rmi -f
+	docker image prune -f
 
-.PHONY : pdf website clean
\ No newline at end of file
+.PHONY : $(LANGS) $(ALL_BUILDS) serve build-env build-all clean
\ No newline at end of file
diff --git a/README-zh-cn.md b/README-zh-cn.md
index 110ffc7..3ad98d9 100644
--- a/README-zh-cn.md
+++ b/README-zh-cn.md
@@ -37,6 +37,14 @@
 
 本书的[网站](https://changkun.de/modern-cpp)源码可以在[这里](./website)找到，由 [hexo](https://hexo.io) 和 [vuejs](https://vuejs.org) 协同构建而成。网站旨在提供一个除 GitHub 之外的阅读方式，除了在桌面端访问之外，你也可以在移动端上阅读本书。
 
+## 构建
+
+如果你希望在本地编译整个仓库，我们建议使用 [Docker](https://docs.docker.com/install/)。如果 Docker 在你的本地能正常使用，则可以简单的通过运行下面的指令完成构建：
+
+```bash
+$ make build
+```
+
 ## 致谢
 
 笔者时间和水平有限，如果读者发现书中内容的错误，欢迎提 [Issue](https://github.com/changkun/modern-cpp-tutorial/issues)，或者直接提 [Pull request](https://github.com/changkun/modern-cpp-tutorial/pulls)。详细贡献指南请参考[如何参与贡献](CONTRIBUTING.md)，由衷感谢每一位指出本书中出现错误的读者，包括但不限于 [Contributors](https://github.com/changkun/modern-cpp-tutorial/graphs/contributors)。
diff --git a/README.md b/README.md
index a9d0eb7..3426115 100644
--- a/README.md
+++ b/README.md
@@ -40,6 +40,14 @@ There are few exercises At the end of each chapter of the book. It is for testin
 
 The source code of the [website](https://changkun.de/modern-cpp) of this book can be found [here](./website), which is built by [hexo](https://hexo.io) and [vuejs](https://vuejs.org). The website provides you another way of reading the book, it is also adapts to mobile.
 
+## Build
+
+If you are interested in build everything locally, it is recommended using [Docker](https://docs.docker.com/install/). To build, simply run:
+
+```bash
+$ make build
+```
+
 ## Acknowledgements
 
 This book was originally written in Chinese by [Changkun Ou](https://changkun.de).
diff --git a/book/zh-cn/10-cpp20.md b/book/zh-cn/10-cpp20.md
index 905d464..3c81c8d 100644
--- a/book/zh-cn/10-cpp20.md
+++ b/book/zh-cn/10-cpp20.md
@@ -55,7 +55,7 @@ void sort(Sortable& c); // c 是一个 Sortable 类型的对象
 
 我们现在来看一个实际的例子。
 
-TODO:
+TODO: https://godbolt.org/z/9liFPD
 
 ## 模块
 
diff --git a/docker/Dockerfile b/docker/Dockerfile
new file mode 100644
index 0000000..0f78b0e
--- /dev/null
+++ b/docker/Dockerfile
@@ -0,0 +1,18 @@
+FROM node:latest
+
+LABEL "maintainer"="Changkun Ou <hi@changkun.us>"
+LABEL "repository"="https://github.com/changkun/modern-cpp-tutorial"
+LABEL "homepage"="https://changkun.de/modern-cpp/"
+
+# FUCKING UNICODE
+ENV LANG C.UTF-8
+ENV LC_ALL C.UTF-8
+
+WORKDIR /modern-cpp-tutorial
+
+# Node & Npm & Python3 are from node:latest
+# Install Texlive & Pandoc
+RUN apt update && \
+    apt install wget texlive-full -y && \
+    wget https://github.com/jgm/pandoc/releases/download/2.7.3/pandoc-2.7.3-1-amd64.deb && \
+    dpkg -i pandoc-2.7.3-1-amd64.deb
diff --git a/pdf/en-us/Makefile b/pdf/en-us/Makefile
index a7b3c39..d51fb45 100644
--- a/pdf/en-us/Makefile
+++ b/pdf/en-us/Makefile
@@ -11,21 +11,21 @@ revision:
 
 pdf: markdown
 	@echo "Compiling PDF file..."
-	@pandoc -f markdown+smart -s $(filename).md -o $(filename).pdf \
+	pandoc -f markdown+smart -s $(filename).md -o $(filename).pdf \
 		--title-prefix $(title) \
 		--listings -H meta/cpp-listings.tex \
 		--template=meta/template.tex \
 		--pdf-engine=`which xelatex`
 	@echo "Done."
-	@rm *.md revision.tex
+	rm *.md revision.tex
 
 markdown:
 	@echo "Copy markdown files..."
-	@cp -r ../../book/en-us/* .
+	cp -r ../../book/en-us/* .
 	@echo "Aggregating markdown files..."
-	@python3 aggregator.py
+	python3 aggregator.py
 
 clean:
-	rm -rf revision.tex *.md *.pdf
+	rm -rf revision.tex *.md
 
 .PHONY: markdown pdf clean
\ No newline at end of file
diff --git a/pdf/en-us/modern-cpp-tutorial.pdf b/pdf/en-us/modern-cpp-tutorial.pdf
index 44650f9..317baf9 100644
Binary files a/pdf/en-us/modern-cpp-tutorial.pdf and b/pdf/en-us/modern-cpp-tutorial.pdf differ
diff --git a/pdf/zh-cn/Makefile b/pdf/zh-cn/Makefile
index fafe598..e8d8d31 100644
--- a/pdf/zh-cn/Makefile
+++ b/pdf/zh-cn/Makefile
@@ -11,21 +11,21 @@ revision:
 
 pdf: markdown
 	@echo "Compiling PDF file..."
-	@pandoc -f markdown+smart -s $(filename).md -o $(filename).pdf \
+	pandoc -f markdown+smart -s $(filename).md -o $(filename).pdf \
 		--title-prefix $(title) \
 		--listings -H meta/cpp-listings.tex \
 		--template=meta/template.tex \
 		--pdf-engine=`which xelatex`
 	@echo "Done."
-	@rm *.md revision.tex
+	rm *.md revision.tex
 
 markdown:
 	@echo "Copy markdown files..."
-	@cp -r ../../book/zh-cn/* .
+	cp -r ../../book/zh-cn/* .
 	@echo "Aggregating markdown files..."
-	@python3 aggregator.py
+	python3 aggregator.py
 
 clean:
-	rm -rf revision.tex *.md *.pdf
+	rm -rf revision.tex *.md
 
 .PHONY: markdown pdf clean
\ No newline at end of file
diff --git a/pdf/zh-cn/aggregator.py b/pdf/zh-cn/aggregator.py
index a5555fa..f8a3c22 100755
--- a/pdf/zh-cn/aggregator.py
+++ b/pdf/zh-cn/aggregator.py
@@ -1,19 +1,21 @@
 # !/usr/bin/env python3
 # author: changkun<hi@changkun.us>
 
-import os
+import os, io
 
 chapters = ['00-preface.md', '01-intro.md',  '02-usability.md', '03-runtime.md', '04-containers.md', '05-pointers.md', '06-regex.md', '07-thread.md', '08-filesystem.md', '09-others.md', '10-cpp20.md', 'appendix1.md', 'appendix2.md']
 
 ignores = ['TOC', '返回目录', '许可', 'license']
 
-with open('modern-cpp-tutorial.md', 'w') as outfile:
-    outfile.write("""---
+head = """---
 title: "高速上手 C++11/14/17/20"
 author: 欧长坤 <hi@changkun.us>
 copyright: cc-by-nc-nd 4.0
 ---
-""")
+"""
+
+with io.open('modern-cpp-tutorial.md', 'w', encoding='utf8') as outfile:
+    outfile.write(head)
     for chapter in chapters:
         if os.path.isfile(chapter):
             with open(chapter) as ch:
diff --git a/pdf/zh-cn/modern-cpp-tutorial.pdf b/pdf/zh-cn/modern-cpp-tutorial.pdf
index 089d003..d716171 100644
Binary files a/pdf/zh-cn/modern-cpp-tutorial.pdf and b/pdf/zh-cn/modern-cpp-tutorial.pdf differ
diff --git a/website/Makefile b/website/Makefile
index 43561df..1caf86d 100755
--- a/website/Makefile
+++ b/website/Makefile
@@ -11,19 +11,17 @@ all: clean
 	cp -r ../assets/figures ./src/modern-cpp/assets/figures
 	cp -r ../exercises ./src/modern-cpp/
 	cp -r ../code ./src/modern-cpp/
-	hexo generate
+	npx hexo generate
 	mv public/index.html public/modern-cpp/index.html
 s: all
 	node_modules/serve/bin/serve.js ./public
 clean:
-	rm -rf ./src/modern-cpp/assets/cover-2nd.png
-	rm -rf ./src/modern-cpp/assets/figures
-	rm -rf public db.json src/modern-cpp/zh-cn
-	rm -rf public db.json src/modern-cpp/en-us
-	rm -rf ./src/modern-cpp/assets/alipay.jpg
-	rm -rf ./src/modern-cpp/assets/wechat.jpg
-	rm -rf ./src/modern-cpp/about/donate.md
-	rm -rf ./src/modern-cpp/about/community.md
-	rm -rf ./src/modern-cpp/code
-	rm -rf ./src/modern-cpp/exercises
-	
\ No newline at end of file
+	rm -rf ./src/modern-cpp/assets/cover-2nd.png \
+		./src/modern-cpp/assets/figures \
+		./src/modern-cpp/assets/alipay.jpg \
+		./src/modern-cpp/assets/wechat.jpg \
+		./src/modern-cpp/about/donate.md \
+		./src/modern-cpp/about/community.md \
+		./src/modern-cpp/code \
+		./src/modern-cpp/exercises \
+		public db.json src/modern-cpp/zh-cn src/modern-cpp/en-us