Fitnes-tracker/Dockerfile

# Builder stage
FROM golang:1.23-bookworm AS builder

WORKDIR /app

COPY go.mod go.sum ./
RUN go mod download

COPY . .

# Build native for the host architecture (ARM64 on Hetzner)
RUN CGO_ENABLED=1 go build -o fitness-app ./main.go



# Runtime stage
FROM debian:bookworm-slim

RUN useradd -m appuser

WORKDIR /app

COPY --from=builder /app/fitness-app /app/fitness-app

# External data dir for sqlite db
RUN mkdir -p /data && chown -R appuser:appuser /data

ENV DATABASE_URL=/data/fitness.db

USER appuser

EXPOSE 8080
VOLUME ["/data"]

CMD ["/app/fitness-app"]