Source Docker Image EOL

[alastairmontgomery1-nhs]

The source Docker image no longer can run an apt update due to being end of line, so the Docker build fails.

08:47:43  #6 [4/6] RUN apt-get update     && apt-get install curl -yq --no-install-recommends     && apt-get clean     && rm -rf /var/lib/apt/lists/*     && pip install --no-cache-dir --upgrade -r /requirements.txt     && mkdir -p /tmp/mesh_store
08:47:43  #6 0.084 Get:1 http://deb.debian.org/debian bullseye InRelease [75.1 kB]
08:47:43  #6 0.091 Get:2 http://deb.debian.org/debian-security bullseye-security InRelease [27.2 kB]
08:47:43  #6 0.091 Get:3 http://deb.debian.org/debian bullseye-updates InRelease [44.0 kB]
08:47:43  #6 0.164 Get:4 http://deb.debian.org/debian bullseye/main amd64 Packages [8066 kB]
08:47:43  #6 0.306 Get:5 http://deb.debian.org/debian bullseye-updates/main amd64 Packages [18.8 kB]
08:47:44  #6 1.021 Reading package lists...
08:47:44  #6 1.419 E: Release file for http://deb.debian.org/debian-security/dists/bullseye-security/InRelease is expired (invalid since 10h 34min 39s). Updates for this repository will not be applied.
08:47:44  #6 ERROR: process "/bin/sh -c apt-get update     && apt-get install curl -yq --no-install-recommends     && apt-get clean     && rm -rf /var/lib/apt/lists/*     && pip install --no-cache-dir --upgrade -r /requirements.txt     && mkdir -p /tmp/mesh_store" did not complete successfully: exit code: 100
08:47:44  ------
08:47:44   > [4/6] RUN apt-get update     && apt-get install curl -yq --no-install-recommends     && apt-get clean     && rm -rf /var/lib/apt/lists/*     && pip install --no-cache-dir --upgrade -r /requirements.txt     && mkdir -p /tmp/mesh_store:
08:47:44  0.084 Get:1 http://deb.debian.org/debian bullseye InRelease [75.1 kB]
08:47:44  0.091 Get:2 http://deb.debian.org/debian-security bullseye-security InRelease [27.2 kB]
08:47:44  0.091 Get:3 http://deb.debian.org/debian bullseye-updates InRelease [44.0 kB]
08:47:44  0.164 Get:4 http://deb.debian.org/debian bullseye/main amd64 Packages [8066 kB]
08:47:44  0.306 Get:5 http://deb.debian.org/debian bullseye-updates/main amd64 Packages [18.8 kB]
08:47:44  
08:47:44  1.419 E: Release file for http://deb.debian.org/debian-security/dists/bullseye-security/InRelease is expired (invalid since 10h 34min 39s). Updates for this repository will not be applied.

❯ curl -s http://deb.debian.org/debian-security/dists/bullseye-security/InRelease | grep -E "Date:|Valid-Until:"
Date: Mon, 31 Aug 2026 21:13:04 UTC
Valid-Until: Mon, 07 Sep 2026 21:13:04 UTC