various notification fixes

src/mail_templates/oom_event-text.ejs

@@ -0,0 +1,24 @@
+Dear <%= cloudronName %> Admin,
+
+<%if (app) { %>
+The application at <%= app.fqdn %> ran out of memory. The application has been restarted automatically. If you see this notification often,
+consider increasing the memory limit - <%= webadminUrl %>/#/app/<%= app.id %>/resources .
+<% } else { %>
+The addon <%= addon.name %> service ran out of memory. The service has been restarted automatically. If you see this notification often,
+consider increasing the memory limit - <%= webadminUrl %>/#/services .
+<% } %>
+
+Out of memory event:
+
+-------------------------------------
+
+<%- event %>
+
+-------------------------------------
+
+Powered by https://cloudron.io
+
+Don't want such mails? Change your notification preferences at <%= notificationsUrl %>
+
+Sent at: <%= new Date().toUTCString() %>
+