diff --git a/Dockerfile b/Dockerfile
index cf39c0c..7bc67d9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,13 +3,15 @@
 ############
 
 FROM node:lts AS build-ui
+
+# env setup
 WORKDIR /usr/local/src/advent22_ui
 
-# install dependencies
+# install advent22_ui dependencies
 COPY ui/package*.json ui/yarn*.lock ./
 RUN yarn install --production false
 
-# copy and build full ui
+# copy and build advent22_ui
 COPY ui ./
 RUN yarn build --dest /tmp/advent22_ui/html
 
@@ -18,21 +20,24 @@ RUN yarn build --dest /tmp/advent22_ui/html
 ###########
 
 FROM tiangolo/uvicorn-gunicorn:python3.11-slim AS production
-WORKDIR /usr/local/src/advent22_api
 
 # env setup
+WORKDIR /usr/local/src/advent22_api
 ENV \  
     PRODUCTION_MODE="true" \
+    PORT="8000" \
     MODULE_NAME="advent22_api.app"
+EXPOSE 8000
 
-# install api
+# install advent22_api
 COPY api ./
 RUN set -ex; \
+    # remove example app
     rm -rf /app; \
     \
     python -m pip --no-cache-dir install ./
 
-# add prebuilt ui
+# add prepared advent22_ui
 COPY --from=build-ui /tmp/advent22_ui /usr/local/share/advent22_ui
 
 # run as unprivileged user