diff --git a/Dockerfile b/Dockerfile
index cd92391..93d52f4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,17 +1,27 @@
 FROM python:2.7-alpine
 
-WORKDIR /opt/pyast
-ADD . /opt/pyast
+RUN apk update && apk add \
+  g++ \
+  make \
+  nodejs
+
+# apk does not install npm with nodejs since Alpine 3.6+
+RUN apk add --update nodejs-npm
+
+WORKDIR /opt/pyast/
+COPY requirements.txt .
+RUN pip install -r requirements.txt
 
-RUN apk update && \
-    apk add g++ make && \
-    apk add nodejs && \
-    pip install -r requirements.txt && \
-    cd /opt/pyast/front && \
-    npm set progress=false && \
-    npm install && \
-    npm run build
+WORKDIR /opt/pyast/front/
+COPY front/ .
+RUN npm set progress=false
+RUN npm install
+RUN npm run build
+
+COPY app.py /opt/pyast/
+COPY parse.py /opt/pyast/
 
 EXPOSE 4361
 
-CMD ["gunicorn", "app:app", "-w" "4", "-b", "'0.0.0.0:4361'"]
+WORKDIR /opt/pyast
+CMD ["gunicorn", "app:app", "-w", "4", "-b", "0.0.0.0:4361"]
diff --git a/README.md b/README.md
index fd18241..b6c803b 100644
--- a/README.md
+++ b/README.md
@@ -5,3 +5,11 @@ The illustrous code behind [python-ast-explorer.com](https://python-ast-explorer
 ## Making sense of it
 
 See the `Dockerfile` for steps to get it up and running. It's basically a pretty bare `react-create-app` artifact that talks to a hacked up Flask app via repeated, desperate calls to `/api/_parse`.
+
+## Local development
+
+Run:
+```bash
+$ docker build -t aster27 .
+$ docker run --rm -it -p 4361:4361 aster27
+```