chore: add Cloudron PackageTemplate, helper script; add .gitattributes/.editorconfig; refine .gitignore; improve workspace scripts

PackagingForCloudronWorkspace/UpstreamVendor-Clone.sh

@@ -205,10 +205,25 @@ https://github.com/funmusicplace/mirlo.git
 
 )
 
-cd Docker
+WORKDIR="$(cd "$(dirname "$0")" && pwd)"
+TARGET_DIR="${WORKDIR}/Docker"
+mkdir -p "$TARGET_DIR"
 
-IFS=$'\n\t'
+# If REPOS.txt exists, read additional repos (lines; ignore # and blanks)
+EXTRA_REPOS_FILE="${WORKDIR}/REPOS.txt"
+if [[ -f "$EXTRA_REPOS_FILE" ]]; then
+  mapfile -t EXTRA_REPOS < <(sed -e 's/#.*$//' -e '/^\s*$/d' "$EXTRA_REPOS_FILE")
+else
+  EXTRA_REPOS=()
+fi
 
-for GIT_REPO in ${GIT_REPO_LIST[@]};do
-	git clone --depth 1 $GIT_REPO || true
-done
+ALL_REPOS=("${GIT_REPO_LIST[@]}" "${EXTRA_REPOS[@]}")
+
+echo "Cloning to: $TARGET_DIR"
+printf ' - %s\n' "${ALL_REPOS[@]}"
+
+cd "$TARGET_DIR"
+
+# Parallel clones (default 4 jobs). Avoid failing the whole script on single failures.
+JOBS="${JOBS:-4}"
+printf '%s\n' "${ALL_REPOS[@]}" | xargs -n1 -P "$JOBS" -I{} bash -lc 'repo="{}"; name=$(basename -s .git "$repo"); if [[ -d "$name/.git" ]]; then echo "exists: $name"; else git clone --depth 1 "$repo" "$name" || echo "failed: $repo"; fi'