Add Docker provider for Vagrant development environment

See merge request tildes-community/tildes-cf!1

ansible/roles/self_signed_ssl_cert/meta/main.yml

@@ -1,3 +0,0 @@
----
-dependencies:
-  - role: nginx

ansible/roles/self_signed_ssl_cert/tasks/main.yml

@@ -2,6 +2,7 @@
 - name: Install packages needed by Ansible community plugins
   pip:
     executable: pip3
+    break_system_packages: true
     name: cryptography
 
 - name: Create directory for certificate
@@ -19,5 +20,3 @@
     path: "{{ ssl_cert_path }}"
     privatekey_path: "{{ ssl_private_key_path }}"
     provider: selfsigned
-  notify:
-    - Reload nginx