sciagent code + Gitea Actions CI/CD

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

fe0/Dockerfile.prod

@@ -0,0 +1,23 @@
+# Production frontend: build static assets, serve via nginx (no Vite dev server).
+FROM node:22-alpine AS build
+
+WORKDIR /app
+
+COPY package*.json ./
+RUN npm ci
+
+COPY . .
+
+ARG VITE_ENV=production
+ENV VITE_ENV=production
+
+RUN npm run build
+
+FROM nginx:1.27-alpine
+
+COPY nginx/default.conf /etc/nginx/conf.d/default.conf
+COPY --from=build /app/dist /usr/share/nginx/html
+
+EXPOSE 8080
+
+CMD ["nginx", "-g", "daemon off;"]