improvement: DockerFiles updated to avoid some deployment issues.

frontend/Dockerfile

@@ -4,7 +4,14 @@ FROM node:20-alpine AS builder
 WORKDIR /app
 
 COPY package*.json ./
-RUN npm ci
+# Same safeguard as backend: incomplete npm ci can leave node_modules/.bin empty.
+RUN npm ci --no-audit --no-fund || true; \
+    if [ ! -e node_modules/.bin/next ]; then \
+      echo "Incomplete npm ci (missing .bin links) — falling back to npm install"; \
+      rm -rf node_modules; \
+      npm install --no-audit --no-fund; \
+    fi; \
+    test -e node_modules/.bin/next
 
 COPY . .