Add: frontend dockerfile

frontend/Dockerfile

@@ -0,0 +1,20 @@
+# ./frontend/Dockerfile
+
+# Use an official Node runtime as a parent image
+FROM node:20-alpine
+
+# Set work directory
+WORKDIR /app
+
+# Copy package.json and package-lock.json (or yarn.lock)
+COPY package*.json ./
+
+# Install dependencies
+RUN npm install
+
+# Copy the rest of the frontend source code
+COPY . .
+
+# The command to run the dev server will be specified in docker-compose.dev.yml
+# Expose the Vite default port (though mapping is done in compose)
+EXPOSE 5173