Update Dockerfile base version, Poetry.

Dockerfile

@@ -1,6 +1,6 @@
 # syntax=docker/dockerfile:1
 # Prepare the base environment.
-FROM python:3.12.6-alpine AS builder_base
+FROM python:3.12.8-alpine AS builder_base
 LABEL [email protected]
 LABEL org.opencontainers.image.source=https://github.com/dbca-wa/healthcheck
 
@@ -20,7 +20,7 @@ RUN addgroup -g ${GID} appuser \
 FROM builder_base AS python_libs_healthcheck
 WORKDIR /app
 COPY poetry.lock pyproject.toml ./
-ARG POETRY_VERSION=1.8.3
+ARG POETRY_VERSION=1.8.5
 RUN pip install --no-cache-dir --root-user-action=ignore poetry==${POETRY_VERSION} \
   && poetry config virtualenvs.create false \
   && poetry install --no-interaction --no-ansi --only main