Dockerfile

# Use Node.js as base image for building the app
FROM node:latest AS builder

# Set working directory
WORKDIR /app

# Copy package.json and package-lock.json to the working directory
COPY package.json package-lock.json ./

# Install dependencies
RUN npm install

# Copy the entire project to the working directory
COPY . .

# Build the app
RUN npm run build

# Use NGINX as a lightweight server to serve the built React app
FROM nginx:latest

# Overwrite NGINX default configuration with custom configuration to handle React Router routing
RUN echo ' \
server { \
    listen 80; \
    server_name localhost; \
    root /usr/share/nginx/html; \
    index index.html; \
    location / { \
        try_files $uri /index.html; \
    } \
}' > /etc/nginx/conf.d/default.conf

# Copy the built app from the builder stage to NGINX web server directory
COPY --from=builder /app/build /usr/share/nginx/html

# Expose port 80
EXPOSE 80

# Start NGINX server
CMD ["nginx", "-g", "daemon off;"]