chore: clean up html5 demo (#550)

examples/html5-node/README.md

@@ -0,0 +1,37 @@
+# Sandbox
+
+## Quickstart Tutorial
+
+View the documentation [here](https://rivet.gg/docs/html5/tutorials/quickstart).
+
+## Prerequisites
+
+- Rivet CLI
+- NodeJS
+- Open ports: 8080 (client), 7777 (game server), 6420 (Rivet)
+
+## Instructions
+
+### Develop
+
+```
+npm install
+npm run dev
+```
+
+Open [http://127.0.0.1:8080](http://127.0.0.1:8080).
+
+### Deploy
+
+```
+rivet login
+rivet deploy prod
+```
+
+#### Connecting
+
+In the client served by `npm run dev`:
+
+1. Run `rivet backend get-endpoint prod` and copy this value to the _Endpoint_ field.
+2. Run `rivet backend get-current-version prod` and copy this value to the _Game Version_ field.
+

examples/html5-node/game_server.Dockerfile

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+FROM node:20-alpine
+RUN adduser -D server
+WORKDIR /app
+
+COPY package.json package.json
+COPY packages/rivet-sdk ./packages/rivet-sdk
+COPY packages/game-server ./packages/game-server
+WORKDIR /app/packages/game-server
+RUN npm install --frozen-lockfile && npm run build
+
+RUN chown -R server:server /app
+USER server
+EXPOSE 7777
+
+CMD ["node", "dist/index.js"]