adding validated services? patching forcad_local.py

OmCTF-2025/services/block_game/frontend/Dockerfile

@@ -0,0 +1,19 @@
+FROM node:24-alpine AS builder
+
+WORKDIR /app
+
+COPY package*.json ./
+
+RUN npm install
+
+COPY . .
+
+RUN npm run build
+
+FROM nginx:latest
+
+COPY --from=builder /app/build /usr/share/nginx/html
+
+COPY nginx.conf /etc/nginx/nginx.conf
+
+CMD ["nginx", "-g", "daemon off;"]