first successful export

DockerFile

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+# Stage 1: Build frontend
+FROM node:20-alpine AS frontend-builder
+WORKDIR /app/frontend
+COPY frontend/package.json frontend/package-lock.json* ./
+RUN npm install
+COPY frontend/ .
+RUN npm run build
+
+# Stage 2: Build Go binary
+FROM golang:1.25.7-alpine AS go-builder
+WORKDIR /app
+COPY go.mod go.sum ./
+RUN go mod download
+COPY . .
+RUN CGO_ENABLED=0 GOOS=linux go build -o server .
+
+# Stage 3: Final image
+FROM alpine:latest
+RUN apk add --no-cache ffmpeg
+WORKDIR /app
+COPY --from=go-builder /app/server .
+COPY --from=frontend-builder /app/frontend/dist ./frontend/dist
+EXPOSE 8080
+CMD ["./server"]