minor fixes

Author: iliakan

README.md

@@ -8,14 +8,16 @@ You can use it to run the tutorial locally and translate it into your language.
 
 Windows, Unix systems and macOS are supported. For Windows, you'll need to call scripts with ".cmd" extension, that are present in the code alongside with Unix versions.
 
+
 # Installation
 
 1. Install [Git](https://git-scm.com/downloads) and [Node.js](https://nodejs.org).
 
     These are required to update and run the project.
     For Windows just download and install, otherwise use standard OS install tools (packages or whatever convenient).
 
-    Please use Node.js 10+.
+    **Please use Node.js 16.**
+    You can find it at https://nodejs.org/download/release/v16.18.1/) or use [NVM](https://github.com/nvm-sh/nvm) to install multiple versions of Node.js and switch between them.
 
     (Maybe later, optional) If you're going to change images, please install [ImageMagick](https://imagemagick.org/script/download.php), use packages for Linux or homebrew/macports for MacOS.
 

dev

@@ -5,7 +5,7 @@
 set -e
 
 export NODE_LANG=$1
-export TUTORIAL_LANG=$1 
+export TUTORIAL_LANG=$1
 export NODE_ENV=development
 export ASSET_VERSIONING=query
 export WATCH=1
@@ -19,4 +19,3 @@ if ! [ -x "$(command -v bunyan)" ]; then
 fi
 
 npm --silent run gulp dev | bunyan -o short -l debug
-

edit

@@ -17,4 +17,3 @@ if ! [ -x "$(command -v bunyan)" ]; then
 fi
 
 npm --silent run -- gulp edit | bunyan -o short -l debug
-

package.json

@@ -9,9 +9,13 @@
     "build": "cross-env NODE_PATH=./modules ./node_modules/.bin/gulp build",
     "gulp": "cross-env NODE_PRESERVE_SYMLINKS=1 NODE_PATH=./modules ./node_modules/.bin/gulp"
   },
+  "engine": {
+    "node": "^16"
+  },
   "precommit": "NODE_ENV=development node `which gulp` pre-commit",
   "//": "node-xmpp-client installs for linux only",
   "dependencies": {
+    "@trysound/sax": "^0.2.0",
     "autoprefixer": "^9",
     "babel-core": "^6",
     "babel-loader": "^7",
@@ -43,7 +47,6 @@
     "koa-mount": "^3",
     "koa-router": "^7",
     "koa-static": "^5",
-    "@trysound/sax": "^0.2.0",
     "limax": "^2.0.0",
     "lodash": "*",
     "markdown-it": "*",