migrate secrets into the database

the infra version is bumped because the nginx's dhparams path has changed
and the sftp server key path has changed.

src/cloudron.js

@@ -77,6 +77,8 @@ function onActivated(options, callback) {
     assert.strictEqual(typeof options, 'object');
     assert.strictEqual(typeof callback, 'function');
 
+    debug('onActivated: running post activation tasks');
+
     // Starting the platform after a user is available means:
     // 1. mail bounces can now be sent to the cloudron owner
     // 2. the restore code path can run without sudo (since mail/ is non-root)