diff --git a/.github/actions/spelling/expect.txt b/.github/actions/spelling/expect.txt
index 5eaed35ee9c30..fb1586901d5ed 100644
--- a/.github/actions/spelling/expect.txt
+++ b/.github/actions/spelling/expect.txt
@@ -197,6 +197,7 @@ copypasta'd
 copypasted
 copytruncate
 corechecks
+corepack
 could've
 counteraaaaaaaaaaa
 cpf
@@ -740,6 +741,7 @@ noauth
 nocapture
 nochild
 nodebuginfo
+nodistro
 nofield
 nofree
 nomac
diff --git a/scripts/environment/bootstrap-ubuntu-20.04.sh b/scripts/environment/bootstrap-ubuntu-20.04.sh
index b5eedad16afca..1c03e031ce843 100755
--- a/scripts/environment/bootstrap-ubuntu-20.04.sh
+++ b/scripts/environment/bootstrap-ubuntu-20.04.sh
@@ -13,17 +13,17 @@ export ACCEPT_EULA=Y
 
 echo 'Acquire::Retries "5";' > /etc/apt/apt.conf.d/80-retries
 
-apt update --yes
+apt-get update --yes
 
-apt install --yes \
+apt-get install --yes \
   software-properties-common \
   apt-utils \
   apt-transport-https
 
-apt upgrade --yes
+apt-get upgrade --yes
 
 # Deps
-apt install --yes --no-install-recommends \
+apt-get install --yes --no-install-recommends \
     awscli \
     build-essential \
     ca-certificates \
@@ -40,8 +40,6 @@ apt install --yes --no-install-recommends \
     libssl-dev \
     llvm \
     locales \
-    nodejs \
-    npm \
     pkg-config \
     python3-pip \
     rename \
@@ -50,8 +48,7 @@ apt install --yes --no-install-recommends \
     shellcheck \
     sudo \
     unzip \
-    wget \
-    yarn
+    wget
 
 # Cue
 TEMP=$(mktemp -d)
@@ -62,6 +59,7 @@ tar \
     -xvf "${TEMP}/cue_v0.5.0_linux_amd64.tar.gz" \
     -C "${TEMP}"
 cp "${TEMP}/cue" /usr/bin/cue
+rm -rf "$TEMP"
 
 # Grease
 # Grease is used for the `make release-github` task.
@@ -73,6 +71,7 @@ tar \
     -xvf "${TEMP}/grease-1.0.1-linux-amd64.tar.gz" \
     -C "${TEMP}"
 cp "${TEMP}/grease/bin/grease" /usr/bin/grease
+rm -rf "$TEMP"
 
 # Locales
 locale-gen en_US.UTF-8
@@ -102,8 +101,8 @@ if ! [ -x "$(command -v docker)" ]; then
         xenial \
         stable"
     # Install those new things
-    apt update --yes
-    apt install --yes docker-ce docker-ce-cli containerd.io
+    apt-get update --yes
+    apt-get install --yes docker-ce docker-ce-cli containerd.io
 
     # ubuntu user doesn't exist in scripts/environment/Dockerfile which runs this
     usermod --append --groups docker ubuntu || true
@@ -117,8 +116,49 @@ fi
 
 bash scripts/environment/install-protoc.sh
 
+# Node.js, npm and yarn.
+# Note: the current LTS for the Node.js toolchain is 18.x
+if ! [ -x "$(command -v node)" ]; then
+    curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key | apt-key add -
+    add-apt-repository \
+        "deb [arch=$(dpkg --print-architecture)] https://deb.nodesource.com/node_18.x \
+        nodistro \
+        main"
+    # Install those new things
+    apt-get update --yes
+    apt-get install --yes nodejs
+
+    # enable corepack (enables the yarn and pnpm package managers)
+    # ref: https://nodejs.org/docs/latest-v18.x/api/corepack.html
+    corepack enable
+fi
+
+# Hugo (static site generator).
+# Hugo is used to build the website content.
+# Note: the installed version should match the version specified in 'netlify.toml'
+TEMP=$(mktemp -d)
+curl \
+    -L https://github.com/gohugoio/hugo/releases/download/v0.84.0/hugo_extended_0.84.0_Linux-64bit.tar.gz \
+    -o "${TEMP}/hugo_extended_0.84.0_Linux-64bit.tar.gz"
+tar \
+    -xvf "${TEMP}/hugo_extended_0.84.0_Linux-64bit.tar.gz" \
+    -C "${TEMP}"
+cp "${TEMP}/hugo" /usr/bin/hugo
+rm -rf "$TEMP"
+
+# htmltest (HTML checker for the website content)
+TEMP=$(mktemp -d)
+curl \
+    -L https://github.com/wjdp/htmltest/releases/download/v0.17.0/htmltest_0.17.0_linux_amd64.tar.gz \
+    -o "${TEMP}/htmltest_0.17.0_linux_amd64.tar.gz"
+tar \
+    -xvf "${TEMP}/htmltest_0.17.0_linux_amd64.tar.gz" \
+    -C "${TEMP}"
+cp "${TEMP}/htmltest" /usr/bin/htmltest
+rm -rf "$TEMP"
+
 # Apt cleanup
-apt clean
+apt-get clean
 
 # Set up the default "deny all warnings" build flags
 CARGO_OVERRIDE_DIR="${HOME}/.cargo"
@@ -146,6 +186,7 @@ if [ -z "${DISABLE_MOLD:-""}" ] ; then
         -C "${TEMP}"
     cp "${TEMP}/${MOLD_TARGET}/bin/mold" /usr/bin/mold
     cp "${TEMP}/${MOLD_TARGET}/lib/mold/mold-wrapper.so" /usr/bin/mold-wrapper.so
+    rm -rf "$TEMP"
 
     # Create our rustc wrapper script that we'll use to actually invoke `rustc` such that `mold` will wrap it and intercept
     # anything linking calls to use `mold` instead of `ld`, etc.