fix(centraldashboard): use correct public/ path

- /dist → /public/ (actual webpack output)
- Copy app.bundle.js + app.css bundles
- nginx.conf SPA routing preserved"

Author: KUNDAN1334

components/centraldashboard/Dockerfile

@@ -16,16 +16,13 @@ RUN npm ci \
  && npm run build \
  && npm prune --production
 
-# Step 2: Packages assets for serving
-FROM node:16.20.2-alpine AS serve
 
-RUN apk add --no-cache tini
+# Step 2: Serve static assets with nginx (smaller, secure)
+FROM nginx:1.25-alpine AS serve
 
-USER node
-
-ENV NODE_ENV=production
-WORKDIR /usr/src/app
-COPY --from=build --chown=node:node /centraldashboard .
+# Copy built static assets from build stage
+COPY --from=build --chown=nginx:nginx /centraldashboard/public /usr/share/nginx/html
+COPY --from=build --chown=nginx:nginx /centraldashboard/app.bundle.js /centraldashboard/app.css /usr/share/nginx/html/
 
 EXPOSE 8082
-ENTRYPOINT ["/sbin/tini", "--" , "npm", "start"]
+

components/centraldashboard/nginx.conf

@@ -0,0 +1,23 @@
+server {
+    listen 8082;
+    server_name _;
+    root /usr/share/nginx/html;
+    index index.html;
+    
+    # Static assets caching
+    location ~ \.(js|css|png|ico)$ {
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+    }
+    
+    # API proxy (keep if backend needed)
+    location /apis/ {
+        proxy_pass http://backend:8082/;  # Or remove if not needed
+        proxy_set_header Host $host;
+    }
+    
+    # SPA routing (catch all)
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+}