Dockerfile

## Multi-stage Dockerfile for MapToPoster Go API

FROM golang:1.24-alpine AS builder

WORKDIR /app

# Install build tools (if CGO-enabled deps are ever needed)
RUN apk add --no-cache git

# Pre-download modules
COPY go.mod go.sum ./
RUN go mod download

# Copy source
COPY . .

# Build a static binary for Linux
RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o /app/bin/maptoposter ./cmd


# Minimal runtime image
FROM alpine:3.20

RUN apk add --no-cache ca-certificates

WORKDIR /app

# Copy binary
COPY --from=builder /app/bin/maptoposter /app/bin/maptoposter

# Copy runtime data needed by the app
COPY themes/ themes/
COPY internal/geocoder/cities.json internal/geocoder/cities.json
COPY internal/poster/fonts internal/poster/fonts
COPY docs docs

ENV PORT=8080
EXPOSE 8080

ENTRYPOINT ["/app/bin/maptoposter"]