diff --git a/Dockerfile b/Dockerfile
index 9f9219d..d80865d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 ARG NODE_VERSION=24
-ARG PYTHON_VERSION=3.14-slim
+ARG PYTHON_VERSION=3.14
 
 ############
 # build ui #
@@ -28,17 +28,16 @@ RUN set -ex; \
     # exclude webpack-bundle-analyzer output
     rm -f /tmp/advent22_ui/report.html;
 
-############
-# main app #
-############
+
+###############
+# install api #
+###############
 
 ARG PYTHON_VERSION
-FROM python:${PYTHON_VERSION} AS production
+FROM dhi.io/python:${PYTHON_VERSION}-dev AS install-api
 
 # env setup for uv
-ENV \
-    PATH="/opt/advent22/api/.venv/bin:$PATH" \
-    UV_COMPILE_BYTECODE=1 \
+ENV UV_COMPILE_BYTECODE=1 \
     UV_NO_DEV=1 \
     UV_LINK_MODE="copy"
 
@@ -68,15 +67,28 @@ RUN --mount=from=ghcr.io/astral-sh/uv,source=/uv,target=/bin/uv \
         --no-editable \
     ;
 
-CMD [ "advent22" ]
-
 # add prepared advent22_ui
-COPY --from=build-ui /tmp/advent22_ui /opt/advent22/ui
+COPY --from=build-ui /tmp/advent22_ui /opt/advent22/ui/
 
 # prepare data directory
+WORKDIR /opt/advent22/data
+RUN chown -R nobody:nobody ./
+
+
+####################
+# production image #
+####################
+
+ARG PYTHON_VERSION
+FROM dhi.io/python:${PYTHON_VERSION} AS production
+
+ENV PATH="/opt/advent22/api/.venv/bin:$PATH"
+CMD [ "advent22" ]
+
+COPY --from=install-api /opt /opt/
+
 WORKDIR /opt/advent22/data
 VOLUME [ "/opt/advent22/data" ]
-RUN chown -R nobody:nogroup ./
 
 # run as unprivileged user
 USER nobody