add Dockerfile

Dockerfile

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+FROM node:25-alpine AS web-builder
+WORKDIR /app
+RUN npm i -g pnpm
+
+COPY ./web/package.json ./web/pnpm-lock.yaml ./
+RUN pnpm install --frozen-lockfile
+
+COPY ./web/ ./
+RUN pnpm build
+
+FROM golang:1.25-alpine AS api-builder
+WORKDIR /app
+
+RUN apk add --no-cache gcc musl-dev
+
+COPY go.mod go.sum ./
+RUN go mod verify && go mod download
+
+COPY . .
+COPY --from=web-builder /app/dist ./web/dist
+
+RUN CGO_ENABLED=1 go build -o tvqueue .
+
+FROM alpine:latest
+WORKDIR /app
+
+COPY --from=api-builder /app/tvqueue /app/tvqueue
+
+EXPOSE 5000
+
+ENTRYPOINT ["/app/tvqueue"]