add hedgedoc

docs/hedgedoc.md

@@ -0,0 +1,15 @@
+# Required variables
+These variables are required. Example values included. Some general variables might also be required for this role.
+
+```
+ports:
+  hedgedoc:
+    http: 8080
+
+docker_vhost_domains: 
+  hedgedoc:
+    - hedgedoc.domain.tld
+
+database_passwords:
+  hedgedoc: secret
+```