Bugfix and more features for v0.3 (#4)

* Pure syncron processes and implement dry-run flag

* Add missing test files

* Implement isolated mode including isolated test

* Use winston for logging

* Add feature

* Doc fixes

* docs docker command typos

* Better method name and fix bug that excluded pending files from domains to request

* Diffie-Hellman, ssl and bugfix

* Let PR push to registry

* Bugfix and docs

* Remove support for TLS 1.1 - soon deprecated

* Tuning site security

* TLS 1.3 not yet supported by nginx

* fix ssl property duplicate

* v0.3 ready