delete old docs (#327)

* delete old docs

* new docs

docs/pages/backend/index.md

@@ -0,0 +1,18 @@
+# 💽 Backends
+
+Backends are the outputs of the backup process. Each location needs at least one.
+
+Note: names of backends MUST be lower case!
+
+```yaml | .autorestic.yml
+version: 2
+
+backends:
+  name-of-backend:
+    type: local
+    path: /data/my/backups
+```
+
+## Types
+
+We restic supports multiple types of backends. See the [full list](/backend/available) for details.