updated Dockerfile anddocker-compose.yml, along with README.md

Dockerfile

@@ -1,15 +1,26 @@
-# Dockerfile
+# Use this image as the platform to build the app
+FROM node:20.11-alpine AS external-website
 
-FROM node:16-alpine
-
-RUN npm install -g pnpm
+# A small line inside the image to show who made it
+LABEL Developers="Dave Lane, dave@laneventures.nz"
 
+# The WORKDIR instruction sets the working directory for everything that will happen next
 WORKDIR /app
-COPY package.json pnpm-lock.yaml ./
-RUN pnpm install --frozen-lockfile
 
+# Copy all local files into the image
 COPY . .
-RUN pnpm build
 
-EXPOSE 3000
-CMD ["node", "build"]
+# Clean install all node modules
+RUN npm ci
+
+# Build SvelteKit app
+RUN npm run build
+
+# Delete source code files that were used to build the app that are no longer needed
+RUN rm -rf src/ static/ emailTemplates/ docker-compose.yml
+
+# The USER instruction sets the user name to use as the default user for the remainder of the current stage
+USER node:node
+
+# This is the command that will be run inside the image when you tell Docker to start the container
+CMD ["node","build/index.js"]