Raise minimum required Node.js version to 12

As Node 10 will be EOL at April 30th, we should stop supporting
and/or promoting the usage of that version.

See also https://endoflife.date/nodejs

Signed-off-by: David Mehren <git@herrmehren.de>

bin/setup

@@ -31,11 +31,11 @@ EOF
   exit 1
 fi
 
-if version_lt "$(node --version)" 'v10.13.0'; then
+if version_lt "$(node --version)" 'v12.0.0'; then
   cat << EOF
 FATAL: Your Node.js version is outdated.
 
-Please upgrade to version 10.13 or higher and try again.
+Please upgrade to version 12 or higher and try again.
 We recommend running the latest LTS release, see https://nodejs.org/en/about/releases/ for details.
 EOF
   exit 1

docs/content/setup/manual-setup.md

@@ -1,7 +1,7 @@
 # Manual Installation
 
 !!! info "Requirements on your server"
-    - Node.js 10.13 or higher
+    - Node.js 12 or higher
     - Database (PostgreSQL, MySQL, MariaDB, SQLite, MSSQL)  
       The database must use charset `utf8`. This is typically the default in PostgreSQL and SQLite.  
       In MySQL and MariaDB UTF-8 might need to be set with `alter database <DBNAME> character set utf8 collate utf8_bin;`  

package.json

@@ -145,7 +145,7 @@
     "**/request": "^2.88.0"
   },
   "engines": {
-    "node": ">=10.13"
+    "node": ">=12"
   },
   "bugs": "https://github.com/hedgedoc/hedgedoc/issues",
   "keywords": [

public/docs/release-notes.md

@@ -1,5 +1,8 @@
 # Release Notes
 ## <i class="fa fa-tag"></i> 1.8.0 <i class="fa fa-calendar-o"></i> UNRELEASED
+
+**Please note:** This release dropped support for Node 10, which is end-of-life since April 2021. You now need at least Node 12 to run HedgeDoc, but we recommend running [the latest LTS release](https://nodejs.org/en/about/releases/).
+
 ### Features
 - Database migrations are now automatically applied on application startup.  
   The separate `.sequelizerc` configuration file is no longer necessary and can be safely deleted.