Ci cd/test runner (#268)

web/frontend/Dockerfile

@@ -0,0 +1,29 @@
+# Stage 1: install every dependency (including dev deps needed to build)
+FROM node:22-alpine AS deps
+WORKDIR /src
+COPY package.json package-lock.json ./
+RUN npm ci
+
+# Stage 2: build the client and server bundles (react-router build)
+FROM deps AS build
+WORKDIR /src
+COPY . .
+RUN npm run build
+
+# Stage 3: production-only dependencies for the runtime image
+FROM node:22-alpine AS prod-deps
+WORKDIR /src
+COPY package.json package-lock.json ./
+RUN npm ci --omit=dev
+
+# Stage 4: runtime
+FROM node:22-alpine AS final
+ENV NODE_ENV=production
+WORKDIR /app
+COPY package.json ./
+COPY --from=prod-deps /src/node_modules ./node_modules
+COPY --from=build /src/build ./build
+COPY --from=build /src/server.js ./server.js
+EXPOSE 3000
+USER node
+CMD ["node", "./server.js"]