Fix frontend Docker build OOM: limit Node heap + request more memory

- Set NODE_OPTIONS=--max-old-space-size=512 in Dockerfile to cap tsc
  heap usage within constrained CI pods
- Add resource requests (1Gi) and limits (2Gi) to frontend Docker
  build steps in Drone pipeline

frontend/Dockerfile

@@ -7,11 +7,13 @@ WORKDIR /app
 COPY package.json package-lock.json* ./
 
 # Install dependencies (prefers yarn if available)
-RUN npm ci 
+RUN npm ci
 
 # Copy all files and build
 COPY . .
 
+# Limit Node.js heap to avoid OOM in constrained CI environments
+ENV NODE_OPTIONS="--max-old-space-size=512"
 RUN npm run build 
 
 FROM nginx:alpine