Add Docker support and update Vite config for container dev

- Add Dockerfile for Node-based Vite dev server setup
- Add empty docker-compose.yml as placeholder
- Set Vite to listen on 0.0.0.0 and strict port 5173 in config

Dockerfile

@@ -0,0 +1,25 @@
+# Use official Node.js image
+FROM node:20
+
+# Set working directory
+WORKDIR /app
+
+# Copy only package.json and package-lock.json for install step
+COPY package.json ./
+# If you have a package-lock.json or pnpm-lock.yaml/yarn.lock, copy it as well
+# COPY package-lock.json ./
+
+# Install dependencies
+RUN npm install
+
+# Now copy the rest of the app
+COPY . .
+
+# Expose the Vite dev server port
+EXPOSE 5173
+
+# Set environment variable if desired (can be overridden in compose)
+ENV HOST=0.0.0.0
+
+# Default command runs Vite dev server
+CMD ["npm", "run", "dev", "--", "--host", "0.0.0.0"]