feat: add bootstrap scripts for one-line installer download

get-cameleer.sh and get-cameleer.ps1 download just the installer
files from Gitea into a local ./installer directory. Usage:

  curl -fsSL https://gitea.siegeln.net/.../get-cameleer.sh | bash
  irm https://gitea.siegeln.net/.../get-cameleer.ps1 | iex

Supports --version=v1.2.0 to pin a specific tag, defaults to main.
Pass --run to auto-execute the installer after download.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

get-cameleer.sh

@@ -0,0 +1,57 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Bootstrap script — downloads the Cameleer installer and runs it.
+# Usage:
+#   curl -fsSL https://get.cameleer.io/install | bash
+#   curl -fsSL https://get.cameleer.io/install | bash -s -- --version v1.2.0
+#   wget -qO- https://gitea.siegeln.net/cameleer/cameleer-saas/raw/branch/main/get-cameleer.sh | bash
+
+REPO="https://gitea.siegeln.net/cameleer/cameleer-saas/raw"
+REF="branch/main"
+DIR="./installer"
+
+# Parse --version / --ref
+for arg in "$@"; do
+  case "$arg" in
+    --version=*) REF="tag/${arg#*=}"; shift ;;
+    --ref=*)     REF="branch/${arg#*=}"; shift ;;
+  esac
+done
+
+BASE="$REPO/$REF"
+
+FILES=(
+  "installer/install.sh"
+  "installer/templates/docker-compose.yml"
+  "installer/templates/docker-compose.saas.yml"
+  "installer/templates/docker-compose.server.yml"
+  "installer/templates/docker-compose.tls.yml"
+  "installer/templates/docker-compose.monitoring.yml"
+  "installer/templates/traefik-dynamic.yml"
+  "installer/templates/.env.example"
+)
+
+echo "Downloading Cameleer installer..."
+
+mkdir -p "$DIR/templates"
+
+for file in "${FILES[@]}"; do
+  local_path="$DIR/${file#installer/}"
+  echo "  ${file#installer/}"
+  curl -fsSL "$BASE/$file" -o "$local_path"
+done
+
+chmod +x "$DIR/install.sh"
+
+echo ""
+echo "Installer ready in $DIR/"
+echo "Run:  cd $DIR && ./install.sh"
+echo ""
+
+# Auto-run if not piped with extra args that look like they want manual control
+if [ "${1:-}" = "--run" ]; then
+  shift
+  cd "$DIR"
+  exec ./install.sh "$@"
+fi