Update README.md

Dockerfile

@@ -1,3 +1,11 @@
+FROM node:latest
+
+WORKDIR /usr/src/
+
+COPY mojo_app/package.json .
+COPY mojo_app/package-lock.json .
+RUN npm install
+
 FROM perl:latest
 
 WORKDIR /opt/app/
@@ -8,9 +16,9 @@ COPY mojo_app ./mojo_app/
 
 RUN cpanm Carton && carton install
 
+WORKDIR /opt/app/mojo_app/
+COPY --from=0 /usr/src/ .
+
 EXPOSE 3000
 
-WORKDIR /opt/app/mojo_app/
-
 ENTRYPOINT ["carton", "exec", "--", "morbo", "script/mojo_app"]
-

README.md

@@ -16,7 +16,17 @@ Visit `localhost:3000` with web browser.
 
 ## serve app with local changes
 
-    $ docker run --rm -it -p 3000:3000 -v $PWD:/opt/app mojo_app
+### install Mojolicious dependencies
+
+    $ docker run --rm -v $PWD:/opt/app --entrypoint carton mojo_app install
+
+### install Node packages
+
+    $ docker run --rm --init -w /opt/mojo_app -v $PWD/mojo_app:/opt/mojo_app node npm install
+
+### start the server
+
+    $ docker run --rm -v $PWD:/opt/app -p 3000:3000 mojo_app
 
 Visit `localhost:3000` with web browser. Changes should load when you reload
 the page, without having to restart the server.