Update Dockerfile

Signed-off-by: Zoey <zoey@z0ey.de>

Dockerfile

@@ -1,18 +1,20 @@
 # syntax=docker/dockerfile:labs
-FROM python:3.13.0-alpine3.20
+FROM python:3.13.0-alpine3.20 AS pip
 ENV PYTHONUNBUFFERED=1
-COPY --from=zoeyvid/curl-quic:419 /usr/local/bin/curl /usr/local/bin/curl
 COPY requirements.txt /tmp/requirements.txt
+RUN apk upgrade --no-cache -a && \
+    apk add --no-cache ca-certificates build-base libffi-dev && \
+    pip install --no-cache-dir -r /tmp/requirements.txt
 
+FROM python:3.13.0-alpine3.20
+ENV PYTHONUNBUFFERED=1
+COPY --from=zoeyvid/curl-quic:419 /usr/local/bin/curl /usr/local/bin/curl
+COPY --from=pip /usr/local /usr/local
 RUN apk upgrade --no-cache -a && \
-    apk add --no-cache ca-certificates tzdata tini jq build-base libffi-dev && \
-    pip install --no-cache-dir -r /tmp/requirements.txt && \
-    apk del --no-cache build-base libffi-dev && \
+    apk add --no-cache ca-certificates tzdata tini jq && \
     mkdir -vp /etc/parsedmarc && \
     chown -R nobody:nobody /tmp /etc/parsedmarc
-
 COPY start.sh /usr/local/bin/start.sh
 COPY config.ini /tmp/config.ini
-
 USER nobody
 ENTRYPOINT ["tini", "--", "start.sh"]