Добавил докер и касторизацию через env

docker/entrypoint.sh

@@ -0,0 +1,20 @@
+#!/bin/sh
+set -eu
+
+APP_TITLE="${APP_TITLE:-Генератор QR-кодов}"
+BANNER_BRAND="${BANNER_BRAND:-iQR}"
+BANNER_SLOGAN="${BANNER_SLOGAN:-— qr-код без излишеств}"
+BANNER_URL="${BANNER_URL:-https://github.com/IliaMiheev/iQR}"
+ACCENT_COLOR="${ACCENT_COLOR:-#ff4500}"
+
+cat > /usr/share/nginx/html/config.json <<EOF
+{
+  "title": "$(printf '%s' "$APP_TITLE" | sed 's/"/\\"/g')",
+  "bannerBrand": "$(printf '%s' "$BANNER_BRAND" | sed 's/"/\\"/g')",
+  "bannerSlogan": "$(printf '%s' "$BANNER_SLOGAN" | sed 's/"/\\"/g')",
+  "bannerUrl": "$(printf '%s' "$BANNER_URL" | sed 's/"/\\"/g')",
+  "accentColor": "$(printf '%s' "$ACCENT_COLOR" | sed 's/"/\\"/g')"
+}
+EOF
+
+exec nginx -g 'daemon off;'