# Build stage

FROM golang:1.23-alpine AS builder

# Install dependencies

RUN apk add --no-cache git

# Set working directory

WORKDIR /app

# Copy go.mod and go.sum files first to leverage Docker cache

COPY go.mod go.sum ./

RUN go mod download

# Copy the source code

COPY . .

# Build the application with optimizations

RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -ldflags="-w -s" -o gorack .

# Run stage

FROM alpine:latest

# Install CA certificates and timezone data

RUN apk --no-cache add ca-certificates tzdata

# Create a non-root user to run the application

RUN adduser -D -H -h /app appuser

WORKDIR /app

# Copy the binary from the builder stage

COPY --from=builder /app/gorack /app/

# Set ownership

RUN chown -R appuser:appuser /app

# Switch to non-root user

USER appuser

# Expose API port

EXPOSE 8080

# Set environment variables

ENV API_PORT=8080

# Run the application

CMD ["/app/gorack"]