revert(deps): update docker.io/plugins/docker docker tag to v20.14.4

This reverts commit 5ffaeaf154.

.markdownlint.yaml

@@ -128,8 +128,8 @@ MD041:
 # MD044/proper-names - Proper names should have the correct capitalization
 MD044:
   # List of proper names
-  names:
-  - PostfixAdmin
+  names: []
+  # - PostfixAdmin
   # Include code blocks
   code_blocks: false
 

Makefile

@@ -1,11 +1,11 @@
 # POSTFIXADMIN_VERSION
 # Only required to install a specifiy version
-POSTFIXADMIN_VERSION?=3.3.11
+POSTFIXADMIN_VERSION?=3.3.13
 
 # CONTAINER_RUNTIME
 # The CONTAINER_RUNTIME variable will be used to specified the path to a
 # container runtime. This is needed to start and run a container image.
-CONTAINER_RUNTIME?=$(shell which docker)
+CONTAINER_RUNTIME?=$(shell which podman)
 
 # POSTFIXADMIN_IMAGE_REGISTRY_NAME
 # Defines the name of the new container to be built using several variables.

renovate.json

@@ -8,9 +8,18 @@
     {
       "addLabels": [ "renovate/droneci", "renovate/automerge" ],
       "automerge": true,
+      "excludePackagePatterns": [ "plugins/docker" ],
       "matchManagers": "droneci",
       "matchUpdateTypes": [ "minor", "patch"]
     },
+    {
+      "description": "Automatically update patch version of used container images in docker files",
+      "addLabels": [ "renovate/container-image", "renovate/automerge" ],
+      "automerge": true,
+      "matchBaseBranches": [ "master" ],
+      "matchManagers": [ "dockerfile" ],
+      "matchUpdateTypes": [ "patch" ]
+    },
     {
       "description": "Trim leading postfixadmin- from git tag",
       "addLabels": [ "renovate/postfixadmin" ],