Add Dockerfile and Nginx configuration for multi-stage build setup

Dockerfile

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+# Stage 1: Build the React frontend
+FROM node:18-alpine AS frontend-builder
+WORKDIR /app/frontend
+
+# Define a build-time argument for the API URL with a default value
+ARG VITE_API_URL=""
+# Set it as an environment variable for the build command
+ENV VITE_API_URL=$VITE_API_URL
+
+# Copy package files and install dependencies
+COPY Frontend/package.json Frontend/package-lock.json* Frontend/yarn.lock* ./
+RUN yarn install --frozen-lockfile
+
+# Copy the rest of the frontend source code
+COPY Frontend/ ./
+
+# Build the static files. Vite will use the VITE_API_URL env var.
+RUN yarn build
+
+# Stage 2: Build the Go backend
+FROM golang:1.19-alpine AS backend-builder
+WORKDIR /app/backend
+
+# Install git for dependency fetching
+RUN apk update && apk add --no-cache git
+
+# Copy go module files and download dependencies
+COPY new-backend/go.mod new-backend/go.sum ./
+RUN go mod download
+
+# Copy the backend source code
+COPY new-backend/ ./
+
+# Build the Go binary
+RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -ldflags="-s -w" -o /monaco-backend .
+
+# Stage 3: Create the final image with Nginx
+FROM nginx:1.25-alpine
+
+# Install Docker client for the backend
+RUN apk update && apk add --no-cache docker-cli
+
+# Copy the Go backend binary
+COPY --from=backend-builder /monaco-backend /usr/local/bin/monaco-backend
+
+# Copy the built frontend files to the Nginx html directory
+COPY --from=frontend-builder /app/frontend/dist /usr/share/nginx/html
+
+# Copy the Nginx configuration
+COPY nginx.conf /etc/nginx/nginx.conf  
+
+# Expose the public port for Nginx
+EXPOSE 80
+
+# Start both the backend and Nginx
+CMD sh -c 'monaco-backend & nginx -g "daemon off;"'

nginx.conf

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+events {}
+
+http {
+    include /etc/nginx/mime.types; # <-- ADD THIS LINE
+
+    server {
+        listen 80;
+        server_name localhost;
+
+        # Serve the static frontend files
+        location / {
+            root   /usr/share/nginx/html;
+            index  index.html index.htm;
+            try_files $uri $uri/ /index.html;
+        }
+
+        # Proxy API requests to the Go backend
+        location /api/ {
+            proxy_pass http://localhost:8081;
+            proxy_http_version 1.1;
+            proxy_set_header Upgrade $http_upgrade;
+            proxy_set_header Connection "upgrade";
+            proxy_set_header Host $host;
+            proxy_set_header X-Real-IP $remote_addr;
+            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_set_header X-Forwarded-Proto $scheme;
+        }
+    }
+}

nginx/nginx.conf

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+events {}
+
+http {
+    include /etc/nginx/mime.types; # <-- ADD THIS LINE
+
+    server {
+        listen 80;
+        server_name localhost;
+
+        # Serve the static frontend files
+        location / {
+            root   /usr/share/nginx/html;
+            index  index.html index.htm;
+            try_files $uri $uri/ /index.html;
+        }
+
+        # Proxy API requests to the Go backend
+        location /api/ {
+            proxy_pass http://localhost:8080;
+            proxy_set_header Host $host;
+            proxy_set_header X-Real-IP $remote_addr;
+            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_set_header X-Forwarded-Proto $scheme;
+        }
+    }
+}