feat: allow owners to set the background image.

This commit allows instance owners to set a background
image for their Pleroma instances. It copies the image from
the ansible controller onto the target host and updates the
Pleroma configuration.

Owners can set the value for pleroma.config.frontend.background
to set the background image. The default image is used if
this value is not set.

roles/init/defaults/main.yml

@@ -13,6 +13,8 @@ pleroma_defaults:
     healthCheck: "true"
     logLevel: info
     federating: "true"
+    frontend:
+      background: ""
     db:
       name: pleroma_db
       user: pleroma

roles/pleroma-backend/tasks/main.yml

@@ -1,5 +1,4 @@
 ---
-# TODO: Do we need ncurses?
 - name: Ensure Pleroma dependencies are installed.
   apk:
     name: unzip, ncurses
@@ -34,6 +33,7 @@
   - "{{ pleroma_base_data_dir }}"
   - "{{ pleroma_uploads_dir }}"
   - "{{ pleroma_static_dir }}"
+  - "{{ pleroma_static_dir }}/images"
 
 - name: Ensuring that the release build of pleroma is downloaded.
   get_url:
@@ -75,6 +75,15 @@
     find {{ pleroma_user.home }} -mindepth 1 -maxdepth 1 -type d | xargs -I dir chmod 0700 dir
     find {{ pleroma_user.home }} -mindepth 1 -maxdepth 1 -type d | xargs -I dir chown -R {{ pleroma_user.name }}:{{ pleroma_user.group }} dir
 
+- name: Uploading the background image to the static directory
+  copy:
+    src: "{{ pleroma.config.frontend.background }}"
+    dest: "{{ pleroma_static_dir }}/images/pleroma-background.png"
+    owner: "{{ pleroma_user.name }}"
+    group: "{{ pleroma_user.group }}"
+    mode: '0400'
+  when: pleroma.config.frontend.background|length
+
 - name: Setting up the Pleroma service.
   copy:
     src: "{{ pleroma_user.home }}/installation/init.d/pleroma"

roles/pleroma-backend/templates/etc_pleroma_config.exs.j2

@@ -71,3 +71,10 @@ config :web_push_encryption, :vapid_details,
   subject: "mailto:{{ pleroma.config.webPushEncryption.email }}",
   private_key: "{{ pleroma.config.webPushEncryption.privateKey }}",
   public_key: "{{ pleroma.config.webPushEncryption.publicKey }}"
+
+{% if pleroma.config.frontend.background|length %}
+config :pleroma, :frontend_configurations,
+  pleroma_fe: %{
+    background: "/images/pleroma-background.png"
+  }
+{% endif %}