Squashed commit of the following:

commit 3b07fcc
Author: Travis-CI <[email protected]>
Date:   Fri Jan 7 18:52:12 2022 +0000

    Update critical file(s) according to Chirpy v5.0.2

commit a8cd880
Author: Travis-CI <[email protected]>
Date:   Tue Jan 4 19:50:28 2022 +0000

    Update critical file(s) according to Chirpy v5.0.1

commit fc54bc5
Author: Cotes Chung <[email protected]>
Date:   Tue Jan 4 18:58:29 2022 +0800

    Update the doc's link in README

commit bf93d13
Author: Travis-CI <[email protected]>
Date:   Sun Jan 2 16:53:02 2022 +0000

    Update critical file(s) according to Chirpy v5.0.0

commit 23942a9
Author: Travis-CI <[email protected]>
Date:   Mon Nov 29 12:35:47 2021 +0000

    Update critical file(s) according to Chirpy v4.3.4

commit 66a784c
Author: Travis-CI <[email protected]>
Date:   Sun Oct 24 20:18:05 2021 +0000

    Update critical file(s) according to Chirpy v4.3.3

commit b8446c9
Author: Travis-CI <[email protected]>
Date:   Thu Oct 14 18:13:57 2021 +0000

    Update critical file(s) according to Chirpy v4.3.2

commit 479cdc3
Author: Travis-CI <[email protected]>
Date:   Fri Oct 1 10:58:50 2021 +0000

    Update critical file(s) according to Chirpy v4.3.1

commit ff41859
Author: Travis-CI <[email protected]>
Date:   Wed Sep 29 20:03:26 2021 +0000

    Update critical file(s) according to Chirpy v4.3.0

commit c2a7480
Author: Cotes Chung <[email protected]>
Date:   Sun Sep 26 01:20:50 2021 +0800

    Update README

commit 4abf09e
Author: Travis-CI <[email protected]>
Date:   Thu Sep 16 13:22:01 2021 +0000

    Update critical file(s) according to Chirpy v4.2.1

commit 2327ec8
Author: Travis-CI <[email protected]>
Date:   Wed Sep 15 17:53:28 2021 +0000

    Update critical file(s) according to Chirpy v4.2.0

commit 45ff5ba
Author: Travis-CI <[email protected]>
Date:   Mon Aug 9 08:49:14 2021 +0000

    Update critical file(s) according to Chirpy v4.1.1

commit 1d16d38
Author: Travis-CI <[email protected]>
Date:   Wed Jul 21 16:54:21 2021 +0000

    Update critical file(s) according to Chirpy v4.1.0

commit 1a82b89
Author: Cotes Chung <[email protected]>
Date:   Wed Jul 21 22:33:34 2021 +0800

    Update README

commit d84dd10
Author: Travis-CI <[email protected]>
Date:   Wed Jun 23 16:55:07 2021 +0000

    Update critical file(s) according to Chirpy v4.0.2

commit 14988e3
Author: Cotes Chung <[email protected]>
Date:   Wed Jun 23 23:26:23 2021 +0800

    Update README

commit 53ccb82
Author: Cotes Chung <[email protected]>
Date:   Fri Jun 4 19:42:36 2021 +0800

    Improve the gitignore

commit 81cfa31
Author: Chao Xiang <[email protected]>
Date:   Tue May 11 21:46:25 2021 +0800

    fix usage on Customing Stylesheet

commit c9806df
Author: Travis-CI <[email protected]>
Date:   Fri May 7 19:36:50 2021 +0000

    Update critical file(s) according to Chirpy v4.0.1

commit 67a9ca6
Author: Travis-CI <[email protected]>
Date:   Fri Apr 30 06:22:50 2021 +0000

    Update critical file(s) according to Chirpy v4.0.0

commit e6b807e
Author: Cotes Chung <[email protected]>
Date:   Fri Apr 30 14:08:12 2021 +0800

    Update README to v4.0.0

commit 15f6f71
Author: Travis-CI <[email protected]>
Date:   Fri Apr 2 08:29:15 2021 +0000

    Update critical file(s) according to Chirpy v3.3.0

commit 1d7d7cf
Author: Cotes Chung <[email protected]>
Date:   Thu Apr 1 04:09:47 2021 +0800

    Update the ruby setup in gh-actions

commit dff8e09
Author: Cotes Chung <[email protected]>
Date:   Mon Mar 1 19:08:40 2021 +0800

    Update the Gemfile

commit 565ce44
Author: Cotes Chung <[email protected]>
Date:   Thu Feb 11 02:58:14 2021 +0800

    Fix the license link in readme

commit 31ed013
Author: Travis-CI <[email protected]>
Date:   Wed Feb 10 13:36:18 2021 +0000

    [Automation] Update critical file(s) according to Chirpy v3.2.0

commit 3c4df16
Author: Cotes Chung <[email protected]>
Date:   Fri Feb 5 22:42:29 2021 +0800

    Improve the readme

commit 4bbd30d
Author: Cotes Chung <[email protected]>
Date:   Wed Feb 3 20:12:23 2021 +0800

    Update 404.html according to the theme (v3.1.0)

commit 7a2365c
Author: Cotes Chung <[email protected]>
Date:   Tue Feb 2 01:37:35 2021 +0800

    Update the site config according to the theme (v3.1.0)

commit 32cd311
Author: Cotes Chung <[email protected]>
Date:   Tue Jan 26 05:13:40 2021 +0800

    Init commit

Author: hyeonukim

_tabs/about.md

@@ -24,4 +24,4 @@ Here are some other works that I have done for fun
 - [Usan Demo](https://youtu.be/Y9rJ05sL8NI).
 
 
-Feel free to explore my posts, and let's connect if you share similar interests!
+Feel free to explore my posts, and let's connect if you share similar interests!

tools/deploy.sh

@@ -0,0 +1,160 @@
+#!/usr/bin/env bash
+#
+# Build, test and then deploy the site content to 'origin/<pages_branch>'
+#
+# Requirement: html-proofer, jekyll
+#
+# Usage: See help information
+
+set -eu
+
+PAGES_BRANCH="gh-pages"
+
+SITE_DIR="_site"
+
+_opt_dry_run=false
+
+_config="_config.yml"
+
+_no_pages_branch=false
+
+_backup_dir="$(mktemp -d)"
+
+_baseurl=""
+
+help() {
+  echo "Build, test and then deploy the site content to 'origin/<pages_branch>'"
+  echo
+  echo "Usage:"
+  echo
+  echo "   bash ./tools/deploy.sh [options]"
+  echo
+  echo "Options:"
+  echo '     -c, --config   "<config_a[,config_b[...]]>"    Specify config file(s)'
+  echo "     --dry-run                Build site and test, but not deploy"
+  echo "     -h, --help               Print this information."
+}
+
+init() {
+  if [[ -z ${GITHUB_ACTION+x} && $_opt_dry_run == 'false' ]]; then
+    echo "ERROR: It is not allowed to deploy outside of the GitHub Action envrionment."
+    echo "Type option '-h' to see the help information."
+    exit -1
+  fi
+
+  _baseurl="$(grep '^baseurl:' _config.yml | sed "s/.*: *//;s/['\"]//g;s/#.*//")"
+}
+
+build() {
+  # clean up
+  if [[ -d $SITE_DIR ]]; then
+    rm -rf "$SITE_DIR"
+  fi
+
+  # build
+  JEKYLL_ENV=production bundle exec jekyll b -d "$SITE_DIR$_baseurl" --config "$_config"
+}
+
+test() {
+  bundle exec htmlproofer \
+    --disable-external \
+    --check-html \
+    --allow_hash_href \
+    "$SITE_DIR"
+}
+
+resume_site_dir() {
+  if [[ -n $_baseurl ]]; then
+    # Move the site file to the regular directory '_site'
+    mv "$SITE_DIR$_baseurl" "${SITE_DIR}-rename"
+    rm -rf "$SITE_DIR"
+    mv "${SITE_DIR}-rename" "$SITE_DIR"
+  fi
+}
+
+setup_gh() {
+  if [[ -z $(git branch -av | grep "$PAGES_BRANCH") ]]; then
+    _no_pages_branch=true
+    git checkout -b "$PAGES_BRANCH"
+  else
+    git checkout "$PAGES_BRANCH"
+  fi
+}
+
+backup() {
+  mv "$SITE_DIR"/* "$_backup_dir"
+  mv .git "$_backup_dir"
+
+  # When adding custom domain from Github website,
+  # the CANME only exist on `gh-pages` branch
+  if [[ -f CNAME ]]; then
+    mv CNAME "$_backup_dir"
+  fi
+}
+
+flush() {
+  rm -rf ./*
+  rm -rf .[^.] .??*
+
+  shopt -s dotglob nullglob
+  mv "$_backup_dir"/* .
+  [[ -f ".nojekyll" ]] || echo "" >".nojekyll"
+}
+
+deploy() {
+  git config --global user.name "GitHub Actions"
+  git config --global user.email "41898282+github-actions[bot]@users.noreply.github.com"
+
+  git update-ref -d HEAD
+  git add -A
+  git commit -m "[Automation] Site update No.${GITHUB_RUN_NUMBER}"
+
+  if $_no_pages_branch; then
+    git push -u origin "$PAGES_BRANCH"
+  else
+    git push -f
+  fi
+}
+
+main() {
+  init
+  build
+  test
+  resume_site_dir
+
+  if $_opt_dry_run; then
+    exit 0
+  fi
+
+  setup_gh
+  backup
+  flush
+  deploy
+}
+
+while (($#)); do
+  opt="$1"
+  case $opt in
+  -c | --config)
+    _config="$2"
+    shift
+    shift
+    ;;
+  --dry-run)
+    # build & test, but not deploy
+    _opt_dry_run=true
+    shift
+    ;;
+  -h | --help)
+    help
+    exit 0
+    ;;
+  *)
+    # unknown option
+    help
+    exit 1
+    ;;
+  esac
+done
+
+main