diff --git a/.github/workflows/generate_doc.yml b/.github/workflows/generate_doc.yaml
similarity index 100%
rename from .github/workflows/generate_doc.yml
rename to .github/workflows/generate_doc.yaml
diff --git a/Makefile b/Makefile
index 2622d90..b8dd159 100644
--- a/Makefile
+++ b/Makefile
@@ -8,16 +8,17 @@ $(PROJ).pdf: lkmpg.tex
 	pdflatex -shell-escape $< 2>/dev/null >/dev/null
 
 html: lkmpg.tex html.cfg
-	make4ht --shell-escape --utf8 --format html5 --config html.cfg --output-dir html lkmpg.tex
-	ln -sf lkmpg.html html/index.html
-	rm -f  lkmpg.xref lkmpg.tmp lkmpg.html lkmpg.css lkmpg.4ct lkmpg.4tc lkmpg.dvi lkmpg.lg lkmpg.idv lkmpg*.svg lkmpg.log lkmpg.aux 
+	sed $ 's/\t/    /g' lkmpg.tex > lkmpg-for-ht.tex
+	make4ht --shell-escape --utf8 --format html5 --config html.cfg --output-dir html  lkmpg-for-ht.tex
+	ln -sf lkmpg-for-ht.html html/index.html
+	rm -f  lkmpg-for-ht.tex lkmpg-for-ht.xref lkmpg-for-ht.tmp lkmpg-for-ht.html lkmpg-for-ht.css lkmpg-for-ht.4ct lkmpg-for-ht.4tc lkmpg-for-ht.dvi lkmpg-for-ht.lg lkmpg-for-ht.idv lkmpg*.svg lkmpg-for-ht.log lkmpg-for-ht.aux
+	rm -rf _minted-$(PROJ) _minted-lkmpg-for-ht
 
 indent:
 	(cd examples; find . -name '*.[ch]' | xargs clang-format -i)
 
 clean:
 	rm -f *.dvi *.aux *.log *.ps *.pdf *.out lkmpg.bbl lkmpg.blg lkmpg.lof lkmpg.toc
-	rm -rf _minted-lkmpg
 	rm -rf html
 
-.PHONY: html
+.PHONY: html
\ No newline at end of file
diff --git a/README.md b/README.md
index b136dd1..8440d43 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,58 @@ The guide has been around since 2001 and most copies of it on the web only descr
 The book can be freely accessed via https://sysprog21.github.io/lkmpg/ or [latest PDF file](https://github.com/sysprog21/lkmpg/releases).
 The original guide may be found at [Linux Documentation Project](http://www.tldp.org/LDP/lkmpg/).
 
+## Getting Started
+
+### Compile on Local Machine
+
+To prepare for build this book on your local machine, we're going to have make, TeXLive (MacTeX), dvipng and latexmk installed. On various Unix/Linux operating systems, this can be done simply by:
+
+```bash
+# Debian / Ubuntu
+$ sudo apt install make texlive-full latexmk dvipng
+
+# Arch / Manjaro
+$ sudo pacman -S make texlive-most texlive-bin dvipng
+
+# macOS
+$ brew install --cask mactex
+$ sudo tlmgr update --self && sudo tlmgr install dvipng latexmk
+```
+
+Now we could build document with following commands:
+
+```bash
+# download project
+$ git clone https://github.com/sysprog21/lkmpg.git && cd lkmpg
+
+# run commands
+$ make all              # compile pdf document
+$ make html             # convert to HTML
+$ make clean            # delete generated files
+```
+
+### Compile with Docker
+
+The compile process could be run completely using Docker. **Using Docker is recommended, as it guarantees the same dependencies with our GitHub Actions wokrflow.
+
+After [install docker engine](https://docs.docker.com/engine/install/) on your machine, pulling the docker image [twtug/lkmpg](https://hub.docker.com/r/twtug/lkmpg) and compile with it.
+
+Execute followings
+
+```bash
+# download project
+$ git clone https://github.com/sysprog21/lkmpg.git && cd lkmpg
+
+# pull docker image and run it as container
+$ docker pull twtug/lkmpg
+$ docker run --rm -it -v $(pwd):/workdir twtug/lkmpg
+
+# run commands
+$ make all              # compile pdf document
+$ make html             # convert to HTML
+$ make clean            # delete generated files
+```
+
 ## License
 
 The Linux Kernel Module Programming Guide is a free book; you may reproduce and/or modify it under the terms of the [Open Software License](https://opensource.org/licenses/OSL-3.0).
diff --git a/examples/procfs4.c b/examples/procfs4.c
index 432b050..9804d12 100644
--- a/examples/procfs4.c
+++ b/examples/procfs4.c
@@ -114,4 +114,4 @@ static void __exit procfs4_exit(void)
 module_init(procfs4_init);
 module_exit(procfs4_exit);
 
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL");
\ No newline at end of file
diff --git a/html.cfg b/html.cfg
index 9211d4c..0e86400 100644
--- a/html.cfg
+++ b/html.cfg
@@ -24,24 +24,21 @@
     vertical-align: top;
 }}
 
+\Css{pre.fancyvrb, {
+    white-space: pre;
+}}
+
 \Css{figure, .fancyvrb, .verbatim {
     margin-inline: 0;
     overflow-x: auto;
 }}
 
-\Css{.ecrm-0500 { 
+\Css{.ecrm-0500 {
     font-size: 70\%;
-    font-style: italic; 
+    font-style: italic;
     color: gray;
-    -webkit-user-select: none;
-    -moz-user-select: none;
-    -o-user-select: none;
-    user-select: none;
-}}
-
-\Css{.ecrm-0500:after {
-    content:" ";
-    white-space: pre;
+    width: 1.5rem;
+    display: inline-block;
     -webkit-user-select: none;
     -moz-user-select: none;
     -o-user-select: none;