diff --git a/Dockerfile b/Dockerfile
index a32439c..230cf8d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,3 +1,12 @@
+FROM node:alpine as node-modules
+
+WORKDIR /usr/src/app
+
+COPY package.json .
+COPY package-lock.json .
+
+RUN npm install
+
 FROM debian:testing-slim
 
 RUN apt-get update \
@@ -5,7 +14,6 @@ RUN apt-get update \
         fonts-roboto \
         inkscape \
         nodejs \
-        npm \
         openscad \
         pstoedit \
         python3 \
@@ -14,14 +22,15 @@ RUN apt-get update \
 
 WORKDIR /usr/src/app
 
-COPY package.json .
-COPY package-lock.json .
+COPY --from=node-modules /usr/src/app/node_modules node_modules
+
 COPY requirements.txt .
 
-RUN npm install \
-    && pip3 install -r requirements.txt
+RUN pip3 install --no-cache-dir -r requirements.txt
 
 RUN mkdir static
 COPY . .
 
 ENTRYPOINT ["gunicorn", "-w", "4", "-b", "0.0.0.0:8000", "server:app"]
+
+EXPOSE 8000
diff --git a/requirements.txt b/requirements.txt
index cf2a721..e4a286c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,2 @@
 flask
 gunicorn
-lxml
diff --git a/server.py b/server.py
index f68b05c..f4ab099 100755
--- a/server.py
+++ b/server.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python3
 from flask import Flask, request, render_template, url_for, redirect
-from lxml import etree
 from subprocess import run
 app = Flask(__name__)