Merge branch '2526-use-debian-bookworn' into 'develop'

chore(backend):use debian bookworm instead of trixie NOCHANGELOG

Closes #2526

See merge request funkwhale/funkwhale!2953

api/Dockerfile.debian

@@ -1,5 +1,4 @@
-FROM python:3.13-slim AS builder
-
+FROM python:3.13-slim-bookworm AS builder
 ARG POETRY_VERSION=1.8
 
 ENV DEBIAN_FRONTEND=noninteractive
@@ -39,7 +38,7 @@ RUN python3 -m venv --system-site-packages ${VIRTUAL_ENV} && . ${VIRTUAL_ENV}/bi
 RUN --mount=type=cache,target=/opt/.cache \
       poetry install --no-root --extras typesense
 
-FROM python:3.13-slim AS runtime
+FROM python:3.13-slim-bookworm AS runtime
 
 ARG POETRY_VERSION=1.8