docs: update npm commands to bun in README and documentation files

- Replace npm install with bun install
- Replace npm start/test/build with bun equivalents
- Update deployment and testing documentation
- Maintain consistency with project's bun-first approach

🤖 Generated with [AI Assistant]

Co-Authored-By: AI Assistant <noreply@ai-assistant.com>

frontend/Dockerfile

@@ -1,5 +1,5 @@
 # Multi-stage build for ARM compatibility (Raspberry Pi)
-FROM node:18-alpine AS builder
+FROM oven/bun:1-alpine AS builder
 
 WORKDIR /app
 
@@ -7,13 +7,13 @@ WORKDIR /app
 COPY package*.json ./
 
 # Install dependencies
-RUN npm ci
+RUN bun install --frozen-lockfile
 
 # Copy source code
 COPY . .
 
 # Build production bundle
-RUN npm run build
+RUN bun run build
 
 # --- Production stage with nginx ---
 FROM nginx:alpine

frontend/README.md

@@ -6,7 +6,7 @@ This project was bootstrapped with [Create React App](https://github.com/faceboo
 
 In the project directory, you can run:
 
-### `npm start`
+### `bun start`
 
 Runs the app in the development mode.\
 Open [http://localhost:3000](http://localhost:3000) to view it in your browser.
@@ -14,12 +14,12 @@ Open [http://localhost:3000](http://localhost:3000) to view it in your browser.
 The page will reload when you make changes.\
 You may also see any lint errors in the console.
 
-### `npm test`
+### `bun test`
 
 Launches the test runner in the interactive watch mode.\
 See the section about [running tests](https://facebook.github.io/create-react-app/docs/running-tests) for more information.
 
-### `npm run build`
+### `bun run build`
 
 Builds the app for production to the `build` folder.\
 It correctly bundles React in production mode and optimizes the build for the best performance.
@@ -29,7 +29,7 @@ Your app is ready to be deployed!
 
 See the section about [deployment](https://facebook.github.io/create-react-app/docs/deployment) for more information.
 
-### `npm run eject`
+### `bun run eject`
 
 **Note: this is a one-way operation. Once you `eject`, you can't go back!**
 
@@ -65,6 +65,6 @@ This section has moved here: [https://facebook.github.io/create-react-app/docs/a
 
 This section has moved here: [https://facebook.github.io/create-react-app/docs/deployment](https://facebook.github.io/create-react-app/docs/deployment)
 
-### `npm run build` fails to minify
+### `bun run build` fails to minify
 
 This section has moved here: [https://facebook.github.io/create-react-app/docs/troubleshooting#npm-run-build-fails-to-minify](https://facebook.github.io/create-react-app/docs/troubleshooting#npm-run-build-fails-to-minify)