Dockerfile is working.

Dockerfile

@@ -1,46 +1,42 @@
-# DOSee Dockerfile to load an nginx webhost server
-
-# Instructions to build and run:
+# DOSee Dockerfile
+#
+# Instructions for use:
+#
+# docker build -t dosee .
+# docker run --name dosee_app -i -p 8086:80 dosee
 #
 # docker build --tag dosee:latest .
 # docker run --name dosee_app --interactive --publish 8086:80 dosee:latest
 #
-# Or in short form:
-# docker build -t dosee .
-# docker run --name dosee_app -i -p 8086:80 dosee
 #
-# Instruction to remove and cleanup:
+# To remove and cleanup:
+#
 # docker stop dosee_app
 # docker container rm dosee_app
 # docker image rm dosee
 
-# nginx stable is used due to its less frequent updates
-# alpine is a tiny linux distribution
-FROM nginx:stable-alpine AS dosee
-LABEL net.dosee.description="DOSee - A MS-DOS emulator for the web"
+# Multi-stage Docker build to reduce the overall image size
+# DOSee will be built in this temporary Node.JS image
+FROM node:current-alpine AS build
 
-COPY src/ /home/nginx/src
-COPY package.json workbox-config.js /home/nginx/
+# Install and update the build dependencies
+RUN apk update &&  \
+    apk add --update yarn && \
+    npm update --global npm
 
-# install dependencies and build the site
-RUN mkdir -p /home/nginx/src
-WORKDIR /home/nginx/
-RUN apk add --update nodejs npm && \
-    npm install --global yarn && \
-    yarn --production && \
-    cp -r /home/nginx/build/* /usr/share/nginx/html/
+# Copy source files
+COPY . /dosee
 
-WORKDIR /usr/share/nginx/html/
+# Compile and build DOSee
+WORKDIR /dosee
+RUN yarn install --audit --production
 
-# cleanup to reduce the image from 250M down to 56M.
-RUN rm -R /home/nginx && \
-    yarn cache clean && \
-    npm -g uninstall yarn && \
-    npm cache clean --force && \
-    apk del nodejs npm && \
-    du -hs /
+# DOSee will be served on this permanent nginx image
+# It should only ammount to around 50 MB in size
+# The nginx stable image is used due to its less frequent updates
+FROM nginx:stable-alpine
+LABEL net.dosee.description="DOSee an MS-DOS emulator for the web"
 
-# optional cleanup
-
-# serve internally over HTTP port 80
-EXPOSE 80
+# Copy DOSee from the build image to the nginx webroot
+RUN rm /usr/share/nginx/html/*
+COPY --from=build /dosee/build/ /usr/share/nginx/html

docker-compose.yml

@@ -1,27 +1,21 @@
-# DOSee Docker compose to load an nginx webhost server
+# DOSee Docker compose
 #
-# Run: docker-compose up -d
+# Run: docker compose up
 # Access in a browser: http://localhost:8086
 #
-# Shell access: docker-compose exec web sh
-# Reset containers: docker-compose rm
-# Reset volumes: docker-compose down --volumes
+# Shell access:     docker compose exec web sh
+# Reset containers: docker compose rm
+# Reset volumes     docker compose down --volumes
 
-version: "3.2"
+version: "3.9"
 
 services:
   web:
     labels:
       net.dosee.description: "DOSee an MS-DOS emulator for the web"
-    container_name: "dosee_web"
-    # nginx stable is used due to its less frequent updates
-    # alpine is a tiny linux distribution
-    image: nginx:stable-alpine
+    container_name: "dosee_app"
+    build: .
+    image: "dosee"
     # expose nginx web port 80 as port 8086
     ports:
       - "8086:80"
-    volumes:
-      # bind your local cloned DOSee repo to nginx's html hosting path
-      - type: bind
-        source: ./src
-        target: /usr/share/nginx/html

docs/README.md

@@ -26,9 +26,9 @@ DOSee is only a user interface and installation process for an incredible emulat
 - A web browser that supports JavaScript ES6 (ECMAScript 2015).<br>
   Current Firefox, Chrome, Edge, Brave or Safari will work fine.
 - A physical keyboard, as MS-DOS is a text-based operating system.
-- [Node.js](https://nodejs.org) with [yarn](https://yarnpkg.com) or [npm](https://www.npmjs.com).
+- [Node.js](https://nodejs.org) plus [yarn](https://yarnpkg.com)/[npm](https://www.npmjs.com) or [Docker](https://www.docker.com/get-started)
 
-**DOSee runs over an HTTP server**, and it can not function using the `file:///` browser protocol.
+**DOSee runs over an HTTP server**, and it can not function over the `file:///` browser protocol.
 
 ### Instructions, _download, build and serve_
 
@@ -42,15 +42,41 @@ cd DOSee
  # install dependencies & build
 yarn # npm install
 
-# serve dosee over port 8086
+# serve DOSee over port 8086
 yarn run serve # npm run serve
 ```
 
 Point a web browser to http://localhost:8086
 
+### Docker container instructions
+
+```bash
+# clone DOSee
+git clone https://github.com/bengarrett/DOSee.git
+cd DOSee
+
+# run the container (tap Ctrl-C to exit)
+docker compose up
+```
+Point a web browser to http://localhost:8086
+
+```bash
+# alternative manual build and run
+docker build -t dosee .
+docker run --name dosee_app -i -p 8086:80 dosee
+
+# clean up and remove
+docker container rm dosee_app
+docker image rm dosee
+```
+
+### Usage & customisations
+
+[Are in the USAGE document](USAGE.md)
+
 ### Editing the JS or HTML
 
-If you edit the source files in `src/` you will need to clear the application storage and unregister the service workers.
+If you edit the source files in `src/` you will need to clear the application storage and unregister the service workers in your web browser.
 
 - In Chrome/Edge bring up the browser Dev Tools in using <kbd>Ctrl</kbd> <kbd>Shift</kbd> <kbd>J</kbd>.<br>
   Select the Application and Storage tab.<br>
@@ -62,33 +88,12 @@ If you edit the source files in `src/` you will need to clear the application st
   Press the Unregister button.
 
 ```bash
-# re-build
+# change to the repo directory
+cd DOSee
+# re-build DOSee
 yarn # npm run install
 ```
 
-### Docker container instructions
-
-```bash
-# clone DOSee
-git clone https://github.com/bengarrett/DOSee.git
-cd DOSee
-
-# build
-docker build -t dosee .
-
-# serve dosee over port 8086, press Ctrl-C to exit
-docker run --name dosee_app -i -p 8086:80 dosee
-
-# cleanup and remove
-docker container rm dosee_app
-docker image rm dosee
-```
-
-Point a web browser to http://localhost:8086
-
-### Usage & customisations
-
-[Is in USAGE](USAGE.md)
 
 ### License