Introduce caching

.drone.yml

@@ -9,6 +9,8 @@ platform:
 
 steps:
   - name: docker-build-and-push
+    cache_from:
+      - "gitea.scubbo.org/${DRONE_REPO}:${DRONE_BRANCH}"
     image: thegeeklab/drone-docker-buildx # Absurd that this isn't offered as first-party!
     privileged: true
     settings:
@@ -18,6 +20,7 @@ steps:
         from_secret: gitea_password
       repo: gitea.scubbo.org/${DRONE_REPO}
       tags:
+        - ${DRONE_BRANCH}
         - ${DRONE_COMMIT_SHA:0:10}
       target: prod
       platforms: