Fixed invite email (#4686)

* Fixed invite email

* Update sample.env

* Update sample.env

app/mailers/user_mailer.rb

@@ -27,6 +27,7 @@ class UserMailer < ApplicationMailer
   def invitation_email
     @name = params[:name]
     @signup_url = params[:signup_url]
+    @email = params[:email]
 
     mail(to: @email, subject: t('email.invitation.invitation_to_join'))
   end

sample.env

@@ -25,16 +25,16 @@ REDIS_URL=
 # Please refer to your SMTP provider to get the values for the variables below
 SMTP_SENDER_EMAIL=
 SMTP_SENDER_NAME=
-SMTP_SERVER=smtp.gmail.com
-SMTP_PORT=465
-SMTP_DOMAIN=gmail.com
+SMTP_SERVER=
+SMTP_PORT=
+SMTP_DOMAIN=
 SMTP_USERNAME=
 SMTP_PASSWORD=
-SMTP_AUTH=login
-SMTP_STARTTLS_AUTO=false
-SMTP_STARTTLS=false
-SMTP_TLS=true
-SMTP_SSL_VERIFY=true
+SMTP_AUTH=
+SMTP_STARTTLS_AUTO=
+SMTP_STARTTLS=
+SMTP_TLS=
+SMTP_SSL_VERIFY=
 
 ### OPTIONAL ENV VARS