build: fix docker

Dockerfile

@@ -21,7 +21,7 @@ WORKDIR $HOME/app
 # where available (npm@5+)
 COPY --chown=user package*.json $HOME/app
 
-RUN npm install
+RUN npm install && npm run build
 
 # Copy the current directory contents into the container at $HOME/app setting the owner to the user
 COPY --chown=user . $HOME/app