Dockerfile

# Multi-stage build for the Go backend
FROM golang:1.25.6-alpine AS builder

# Set working directory
WORKDIR /app

# Copy go mod and sum to download dependencies
COPY backend/go.mod backend/go.sum ./
RUN go mod download

# Copy the rest of the source code into working directory
COPY backend/. ./

# Copy migrations from repo root into the build context so migrations are available at runtime
# Build the binary
RUN CGO_ENABLED=0 GOOS=linux go build -o splitcash ./main.go

# Final image
FROM alpine:latest

# Add ca-certificates for TLS support
RUN apk --no-cache add ca-certificates

WORKDIR /root/

# Copy binary and static files
COPY --from=builder /app/splitcash .
COPY --from=builder /app/openapi.yaml .
COPY --from=builder /app/swagger-ui.html .
COPY --from=builder /app/migrations ./migrations

# copy example environment variables as a starting point
COPY --from=builder /app/env.example .env

# Expose the port the app listens on
EXPOSE 8080

# Entrypoint
CMD ["./splitcash"]