Escape user input in ladp filters

#RUN npm cache clean --force

RUN npm install ldapts-search

RUN npm install ldapts

RUN npm install ldap-escape

#RUN npm install bcrypt@5.0.0

# This variant of updateing texlive does not work

const util = require('util')

const { Client } = require('ldapts');

const ldapEscape = require('ldap-escape');

// https://www.npmjs.com/package/@overleaf/o-error

// have a look if we can do nice error messages.

    const ldap_base = process.env.LDAP_BASE

    var mail = query.email

    var uid = query.email.split('@')[0]

    const filterstr = '(&' + process.env.LDAP_GROUP_FILTER + '(uid=' + uid + '))'

    const filterstr = '(&' + process.env.LDAP_GROUP_FILTER + '(' + ldapEscape.filter`uid=${uid}` + '))'

    var userDn = "" //'uid=' + uid + ',' + ldap_bd;

    var firstname = ""

    var lastname = ""

      // if admin filter is set - only set admin for user in ldap group

      // does not matter - admin is deactivated: managed through ldap

      if (process.env.LDAP_ADMIN_GROUP_FILTER) {

        const adminfilter = '(&' + process.env.LDAP_ADMIN_GROUP_FILTER + '(uid=' + uid + '))' 

        const adminfilter = '(&' + process.env.LDAP_ADMIN_GROUP_FILTER + '(' +ldapEscape.filter`uid=${uid}` + '))'

        adminEntry = await client.search(ldap_base, {

          scope: 'sub',

          filter: adminfilter,

    } catch (ex) {

      console.log("Could not bind User: " + userDn + " err: " + String(ex))

      return callback(null, null)

    } finally{

      await client.unbind()

    }

    //console.log("Logging in user: " + mail + " Name: " + firstname + " " + lastname + " isAdmin: " + String(isAdmin))