keep only latest docker release

.drone.yml

@@ -1,77 +1,37 @@
 kind: pipeline
+type: docker
 name: default
 
 steps:
-  - name: build-alpine
-    image: plugins/docker:linux-amd64
-    pull: always
-    settings:
-      dockerfile: Dockerfile-alpine
-      daemon_off: false
-      dry_run: true
-      repo: docker.asperti.com/paspo/angry-squid
-      tags:
-        - latest
-        - alpine-latest
-    when:
-      event:
-        exclude:
-        - tag
-
-  - name: build-debian
-    image: plugins/docker:linux-amd64
-    pull: always
-    settings:
-      dockerfile: Dockerfile-debian
-      daemon_off: false
-      dry_run: true
-      repo: docker.asperti.com/paspo/angry-squid
-      tags:
-        - debian-latest
-    when:
-      event:
-        exclude:
-        - tag
-        
   - name: build_and_publish-alpine
     image: plugins/docker:linux-amd64
-    pull: always
     settings:
-      dockerfile: Dockerfile-alpine
-      auto_tag: true
-      auto_tag_suffix: alpine
-      force_tag: true
-      daemon_off: false
+      username:
+        from_secret: docker_username
       password:
         from_secret: docker_password
+      dockerfile: Dockerfile-alpine
       registry: docker.asperti.com
       repo: docker.asperti.com/paspo/angry-squid
       tags:
         - latest
         - alpine-latest
-      username:
-        from_secret: docker_username
-    when:
-      event:
-      - tag
+      force_tag: true
 
   - name: build_and_publish-debian
     image: plugins/docker:linux-amd64
-    pull: always
     settings:
-      dockerfile: Dockerfile-debian
-      auto_tag: true
-      auto_tag_suffix: debian
-      force_tag: true
-      daemon_off: false
+      username:
+        from_secret: docker_username
       password:
         from_secret: docker_password
+      dockerfile: Dockerfile-debian
       registry: docker.asperti.com
       repo: docker.asperti.com/paspo/angry-squid
       tags:
         - debian-latest
-      username:
-        from_secret: docker_username
-    when:
-      event:
-      - tag
+      force_tag: true
+
+trigger:
+  event:
+    - tag

Dockerfile-alpine

@@ -1,4 +1,4 @@
-FROM alpine:3.12
+FROM alpine:3.15
 
 RUN apk -U upgrade && \
     apk add squid perl && \

Dockerfile-debian

@@ -1,4 +1,4 @@
-FROM debian:10
+FROM debian:11
 
 RUN apt-get update && \
     apt-get -y upgrade && \