Dockerfile

# Build stage
FROM node:20-alpine as build

WORKDIR /app

# Copy package.json and install dependencies
COPY package*.json ./
RUN npm ci

# Copy the rest of the application code
COPY . .

# Build the app
RUN npm run build

# Production stage with nginx
FROM nginx:alpine

# Copy built app to nginx
COPY --from=build /app/build /usr/share/nginx/html
COPY nginx.conf /etc/nginx/conf.d/default.conf

# Create a proper nginx.conf using /dev/shm which is usually writable in containers
RUN { \
        echo 'worker_processes  auto;'; \
        echo 'error_log  /dev/stderr warn;'; \
        echo 'pid        /dev/shm/nginx.pid;'; \
        echo 'events {'; \
        echo '    worker_connections  1024;'; \
        echo '}'; \
        echo 'http {'; \
        echo '    include       /etc/nginx/mime.types;'; \
        echo '    default_type  application/octet-stream;'; \
        echo '    client_body_temp_path /dev/shm/client_temp;'; \
        echo '    proxy_temp_path /dev/shm/proxy_temp;'; \
        echo '    fastcgi_temp_path /dev/shm/fastcgi_temp;'; \
        echo '    uwsgi_temp_path /dev/shm/uwsgi_temp;'; \
        echo '    scgi_temp_path /dev/shm/scgi_temp;'; \
        echo '    log_format  main  "$remote_addr - $remote_user [$time_local] \"$request\" $status $body_bytes_sent \"$http_referer\" \"$http_user_agent\" \"$http_x_forwarded_for\"";'; \
        echo '    access_log  /dev/stdout  main;'; \
        echo '    sendfile        on;'; \
        echo '    keepalive_timeout  65;'; \
        echo '    include /etc/nginx/conf.d/*.conf;'; \
        echo '}'; \
    } > /etc/nginx/nginx.conf

# Create necessary directories in /dev/shm for nginx temp files
RUN mkdir -p /dev/shm/client_temp \
    /dev/shm/proxy_temp \
    /dev/shm/fastcgi_temp \
    /dev/shm/uwsgi_temp \
    /dev/shm/scgi_temp

# Expose port
EXPOSE 3000

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