Website: include example flamenco-manager.yaml

Sometimes the setup assistant doesn't work (port already in use, Blender
not installed), so having an example file will make it possible to still
start Flamenco.

web/project-website/content/usage/manager-configuration/_index.md

@@ -0,0 +1,52 @@
+---
+title: Manager Configuration
+weight: 3
+---
+
+Flamenco Manager reads its configuration from `flamenco-manager.yaml`, located
+next to the `flamenco-manager` executable. The previous chapters
+([Shared Storage][storage] and [Variables][variables]) also described parts of
+that configuration file.
+
+## Example Configuration
+
+This is an example `flamenco-manager.yaml` file:
+
+```yaml
+_meta:
+  version: 3
+manager_name: Flamenco Manager
+database: flamenco-manager.sqlite
+listen: :8080
+autodiscoverable: true
+local_manager_storage_path: ./flamenco-manager-storage
+shared_storage_path: /path/to/storage
+shaman:
+  enabled: true
+  garbageCollect:
+    period: 24h0m0s
+    maxAge: 744h0m0s
+    extraCheckoutPaths: []
+task_timeout: 10m0s
+worker_timeout: 1m0s
+blocklist_threshold: 3
+task_fail_after_softfail_count: 3
+variables:
+  blender:
+    values:
+      - platform: linux
+        value: blender
+      - platform: windows
+        value: blender
+      - platform: darwin
+        value: blender
+  blenderArgs:
+    values:
+      - platform: all
+        value: -b -y
+```
+
+The usual way to create a configuration file is simply by starting Flamenco
+Manager. If there is no config file yet, it will start the setup assistant to
+create one. If for any reasons the setup assistant is not usable for you, you
+can use the above example to create `flamenco-manager.yaml` yourself.