Update Dockerfile

Dockerfile

@@ -1,6 +1,6 @@
 FROM ubuntu:bionic
 
-# Install necessary packages including xvfb and Nginx
+# Install necessary packages including Nginx and xvfb
 RUN apt-get update && \
     apt-get install -y \
     xvfb \
@@ -10,16 +10,18 @@ RUN apt-get update && \
     apt-get clean && \
     rm -rf /var/lib/apt/lists/*
 
-# Create application directories
-RUN mkdir -p /app /app/build /var/log/nginx /var/lib/nginx /var/cache/nginx /usr/share/nginx/html /usr/share/nginx/html-page
+# Create necessary directories with appropriate permissions
+RUN mkdir -p /app/build /var/log/nginx /var/lib/nginx /var/cache/nginx /usr/share/nginx/html /usr/share/nginx/html-page && \
+    chown -R www-data:www-data /var/log/nginx /var/lib/nginx /var/cache/nginx /usr/share/nginx/html /usr/share/nginx/html-page
 
-# Set ownership and permissions for Nginx directories
-RUN chown -R www-data:www-data /var/log/nginx /var/lib/nginx /var/cache/nginx /usr/share/nginx/html /usr/share/nginx/html-page
-
-# Copy backend server files and set permissions
+# Copy backend server files
 COPY build/ /app/build/
+
+# Copy Nginx configuration files
 COPY etc/nginx/nginx.conf /etc/nginx/nginx.conf
 COPY etc/nginx/conf.d /etc/nginx/conf.d
+
+# Copy webgl build and HTML page
 COPY webgl-build /usr/share/nginx/html
 COPY html-page /usr/share/nginx/html-page