fix: Make UID:GID in Dockerfile align with docker-compose

* No obvious functional impact? But permission issues and a nameless user likely have side-effects.

Dockerfile

@@ -22,11 +22,11 @@ RUN poetry install --only main
 FROM python-base as production
 RUN apt-get update
 RUN apt-get install -y --no-install-recommends libjpeg-dev libxslt1-dev libxml2-dev libxslt-dev
-RUN groupadd --gid 1000 microblogpub \
-  && useradd --uid 1000 --gid microblogpub --shell /bin/bash microblogpub
+RUN groupadd --gid 1001 microblogpub \
+  && useradd --uid 1001 --gid microblogpub --shell /bin/bash microblogpub
 COPY --from=builder-base $PYSETUP_PATH $PYSETUP_PATH
 COPY . /app/
-RUN chown -R 1000:1000 /app
+RUN chown -R 1001:1001 /app
 USER microblogpub
 WORKDIR /app
 EXPOSE 8000