Update base OS & borg

.github/workflows/docker-publish.yml

@@ -1,10 +1,5 @@
 name: Docker
 
-# This workflow uses actions that are not certified by GitHub.
-# They are provided by a third-party and are governed by
-# separate terms of service, privacy policy, and support
-# documentation.
-
 on:
   push:
     branches: [ "main" ]
@@ -19,7 +14,6 @@ env:
   # github.repository as <account>/<repo>
   IMAGE_NAME: ${{ github.repository }}
 
-
 jobs:
   build:
 

Dockerfile

@@ -1,9 +1,14 @@
-FROM alpine:3.20.0
+FROM alpine:3.21.2
 
 # this is the default, but just to be explicit
 USER root
 
-RUN apk --no-cache add btrfs-progs openssh borgbackup bash coreutils
+RUN apk --no-cache add \
+    btrfs-progs \
+    openssh \
+    bash \
+    coreutils \
+    borgbackup=1.4.0-r0
 
 COPY src /src
 COPY config/ssh_config /etc/ssh/