feat: add cache to drone CD

.drone.yml

@@ -4,8 +4,20 @@ type: docker
 name: CI
 
 steps:
+  - name: restore docker cache
+    image: drillster/drone-volume-cache
+    volumes:
+      - name: pleroma-docker
+        path: /cache/pleroma/docker
+    settings:
+      restore: true
+      mount:
+         - /var/cache/pleroma-drone-build
+
   - name: docker
     image: plugins/docker
+    depends_on:
+      - "restore docker cache"
     settings:
       username: phundrak
       password:
@@ -19,4 +31,18 @@ steps:
           --pull
           --platform amd64
           --tag "phundrak/pleroma:latest"
+          --cache-from type=local,dest=/var/cache/pleroma-drone-build
+          --cache-to type=local,dest=/var/cache/pleroma-drone-build
         )
+
+  - name: rebuild cache docker
+    image: drillster/drone-volume-cache
+    depends_on:
+      - "docker"
+    volumes:
+      - name: pleroma-docker
+        path: /cache/pleroma/docker
+    settings:
+      rebuild: true
+      mount:
+        - /var/cache/pleroma-drone-build