Refactor Docker setup and enhance PWA features with service worker, caching, and manifest updates

Dockerfile

@@ -1,5 +1,19 @@
 FROM nginx:alpine
 LABEL maintainer="services-homepage"
-COPY . /usr/share/nginx/html
+
+# Copy all static files into the image
+COPY index.html /usr/share/nginx/html/
+COPY styles.css /usr/share/nginx/html/
+COPY manifest.json /usr/share/nginx/html/
+COPY sw.js /usr/share/nginx/html/
+COPY README.md /usr/share/nginx/html/
+COPY FAQ.md /usr/share/nginx/html/
+COPY logos/ /usr/share/nginx/html/logos/
+COPY js/ /usr/share/nginx/html/js/
+COPY nginx.conf /etc/nginx/nginx.conf
+
+# Expose port 80
 EXPOSE 80
+
+# services.xml will be mounted at runtime as a bind mount
 CMD ["nginx", "-g", "daemon off;"]