3x-ui/Dockerfile.backend

# Stage 1: Build the Go application
FROM golang:1.24.3-alpine AS builder

WORKDIR /app

# Copy go.mod and go.sum and download dependencies
COPY go.mod go.sum ./
RUN apk add --no-cache gcc musl-dev sqlite-dev
RUN go mod download

# Copy the rest of the application source code
COPY . .

# Build the Go application
# Assuming the main package is in the root and output is 'x-ui' or 'main'
# The original entrypoint seems to be related to x-ui.sh or DockerEntrypoint.sh
# We need to ensure the binary is built correctly.
# For 3x-ui, the main.go seems to be the entry point.
RUN CGO_ENABLED=1 GOOS=linux go build -a -installsuffix cgo -o /app/x-ui main.go

# Stage 2: Production environment
FROM alpine:latest

WORKDIR /app

# Copy the binary from the builder stage
COPY --from=builder /app/x-ui /app/x-ui
COPY --from=builder /app/x-ui.sh /app/x-ui.sh
COPY --from=builder /app/DockerEntrypoint.sh /app/DockerEntrypoint.sh
COPY --from=builder /app/config/name /app/config/name
COPY --from=builder /app/config/version /app/config/version


# Ensure necessary directories exist and have correct permissions if needed by the app
# The original compose file mounts $PWD/db/:/etc/x-ui/ and $PWD/cert/:/root/cert/
# So, these paths should be available or created by the entrypoint script.
RUN apk add --no-cache sqlite fail2ban
RUN mkdir -p /etc/x-ui && \
    mkdir -p /root/cert && \
    chmod +x /app/x-ui.sh /app/DockerEntrypoint.sh /app/x-ui

# Expose default panel port (e.g., 2053, but this will be handled by docker-compose)
# The original compose uses network_mode: host, so ports are directly from the app.
# If we move away from network_mode: host, we'll need to EXPOSE the correct port here.
# Let's assume the Go app listens on a port defined by an ENV or config, e.g., 2053
EXPOSE 2053

# Entrypoint
ENTRYPOINT ["/app/DockerEntrypoint.sh"]
CMD ["/app/x-ui"] # Default command if DockerEntrypoint.sh doesn't override