Run hugo via go run and lock its version (#22206)

- Don't rely on obscure docker images like `plugins/hugo`
- Lock down `hugo` to same version the image had used
- Remove unnecessary verbosity in `trans-copy`
- Rename `trans-copy` to `trans-copy.sh`

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: John Olheiser <john+github@jolheiser.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>

docs/scripts/trans-copy.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+set -e
+
+#
+# This script is used to copy the en-US content to our available locales as a
+# fallback to always show all pages when displaying a specific locale that is
+# missing some documents to be translated.
+#
+# Just execute the script without any argument and you will get the missing
+# files copied into the content folder. We are calling this script within the CI
+# server simply by `make trans-copy`.
+#
+
+declare -a LOCALES=(
+  "fr-fr"
+  "nl-nl"
+  "pt-br"
+  "zh-cn"
+  "zh-tw"
+)
+
+ROOT=$(realpath $(dirname $0)/..)
+
+for SOURCE in $(find ${ROOT}/content -type f -iname *.en-us.md); do
+  for LOCALE in "${LOCALES[@]}"; do
+    DEST="${SOURCE%.en-us.md}.${LOCALE}.md"
+
+    if [[ ! -f ${DEST} ]]; then
+      cp ${SOURCE} ${DEST}
+      sed -i.bak "s/en\-us/${LOCALE}/g" ${DEST}
+      rm ${DEST}.bak
+    fi
+  done
+done