build(docker): Update Dockerfile with starter-kit performance improve…

…ments

.dockerignore

@@ -3,9 +3,7 @@
 
 node_modules/
 
-designs/
 dist/
-# Temporary until we remove the old docs
-docs/
+
 icons/
 styleguide/

Dockerfile

@@ -8,35 +8,34 @@
 FROM node:6-alpine
 
 # Set the working directory for following commands.
+ENV HOME=/app
 WORKDIR /app
 
 # Add a user so that we don't run as root:
 #  https://github.com/telusdigital/reference-architecture/blob/master/delivery/docker.md#root-vs-user-mode
-ENV UID=911 GID=0 HOME=/root
-RUN adduser -D -u $UID -G root -h $HOME nodeuser
+RUN set -ex && \
+    adduser node root && \
+    chmod g+w /app
 
 # Copy only the files necessary to install dependencies into the working directory.
 # Docker builds the image in layers and caches them. Because the app files change more often than the dependencies, we
 #  copy the app files only after we install the depencendies.
-COPY package.json yarn.lock .npmrc ./
+COPY .npmrc package.json yarn.lock ./
 
 # Install dependencies.
-RUN yarn install
+RUN set -ex && \
+    yarn install --pure-lockfile && \
+    yarn cache clean
 
 # Copy all source and test files into the working directory.
 # We use a .dockerignore file to prevent unnecessary or large files from being inadvertently copied.
 COPY . /app
 
 # Build the app.
-# Then give access to the app directory
-RUN set -ex && \
-    yarn build && \
-    yarn cache clean && \
-    chmod -R g+rw /app $HOME && \
-    chmod g+x $HOME
+RUN yarn run build
 
 # Set the container's user to the newly created one.
-USER nodeuser
+USER node
 
 # The entrypoint configures the container to be run as an executable.
 # Arguments supplied on the command line will be forwarded onto the entrypoint.