ci: Bump runtime image to bookworm

.github/workflows/docker-backend.yml

@@ -23,15 +23,32 @@ on:
         required: false
         type: string
         default: famedly-ci
+      # Github Actions workflow inputs can't be lists, so this is probably the least bad way of doing this currently
+      build_amd64:
+        required: false
+        type: boolean
+        default: true
+      build_armv8:
+        required: false
+        type: boolean
+        default: false
 env:
   RUSTC_WRAPPER: cachepot
   REGISTRY_SNAPSHOTS: docker-nightly.nexus.famedly.de
   REGISTRY_RELEASES: docker-releases.nexus.famedly.de
   REGISTRY_OSS: docker-oss.nexus.famedly.de
 
 jobs:
+  determine_platforms:
+    steps:
+
+
   docker:
-    runs-on: ubuntu-latest-16core
+    strategy:
+      matrix:
+        platform: [amd64, armv8]
+    runs-on: {{ }}
+    needs: [determine_platforms]
     steps:
       - uses: actions/checkout@v3
 

Dockerfile

@@ -1,2 +1,2 @@
-FROM debian:bullseye-slim
+FROM debian:bookworm-slim
 CMD ["/usr/local/bin/bash"]

subfolder/Dockerfile

@@ -1,2 +1,2 @@
-FROM debian:bullseye-slim
+FROM debian:bookworm-slim
 CMD ["/usr/local/bin/bash"]

subfolder/subsubfolder/Dockerfile

@@ -1,2 +1,2 @@
-FROM debian:bullseye-slim
+FROM debian:bookworm-slim
 CMD ["/usr/local/bin/bash"]