Updated dockerfile for new file structure

docker/Dockerfile

@@ -6,23 +6,32 @@ RUN npm install
 COPY ./ ./
 RUN npm run build
 
-# Build backend
-FROM node:18-alpine AS backend-build
-WORKDIR /app/src/backend
+# Build backend and configure nginx
+FROM node:18-alpine AS build
+WORKDIR /app
+
+# Copy backend code
 COPY ./src/backend /app/src/backend
 
-# Configure nginx
-FROM nginx:alpine
+# Install nginx, nodejs, and npm
+RUN apk add --no-cache nginx nodejs npm
 
-RUN apk add --no-cache nodejs npm
+# Copy nginx configuration
 COPY docker/nginx.conf /etc/nginx/nginx.conf
+
+# Copy the built frontend files
 COPY --from=frontend-build /app/dist /usr/share/nginx/html
-COPY --from=backend-build /app/src/backend /src/backend
-COPY --from=backend-build /app/src/backend/entrypoint.sh /src/backend/entrypoint.sh
 
-# Configure start-up
+# Copy the backend files
+COPY --from=build /app/src/backend /src/backend
+COPY --from=build /app/src/backend/entrypoint.sh /src/backend/entrypoint.sh
+
+# Set up start-up
 RUN chmod +x /src/backend/entrypoint.sh
-ENTRYPOINT ["/src/backend/entrypoint.sh"]
 
+# Expose necessary ports
 EXPOSE 8080
-EXPOSE 8081
+EXPOSE 8081
+
+# Use entrypoint.sh to run both the backend and nginx
+ENTRYPOINT ["/src/backend/entrypoint.sh"]