Initial commit — energy dashboard frontend (TimescaleDB + Vue/Chart.js)

Dockerfile

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+# Stage 1: Build frontend
+FROM node:22-alpine AS frontend
+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:1.24-alpine AS backend
+WORKDIR /app
+COPY go.mod go.sum ./
+RUN go mod download
+COPY . .
+COPY --from=frontend /app/dist ./dist
+RUN CGO_ENABLED=0 go build -o energy-frontend .
+
+# Stage 3: Minimal runtime
+FROM alpine:3.21
+RUN apk add --no-cache ca-certificates tzdata
+WORKDIR /app
+COPY --from=backend /app/energy-frontend .
+EXPOSE 8080
+USER nobody:nobody
+ENTRYPOINT ["./energy-frontend"]