Dockerfile

# Multi-stage build for MaskTunnel
FROM golang:1.24-alpine AS builder

# Install ca-certificates for build
RUN apk add --no-cache ca-certificates git

WORKDIR /app

# Copy go mod files
COPY go.mod go.sum ./

# Download dependencies
RUN go mod download

# Copy source code
COPY . .

# Build the binary
RUN CGO_ENABLED=0 GOOS=linux go build \
    -a -installsuffix cgo \
    -ldflags="-w -s" \
    -o masktunnel \
    ./cmd/masktunnel

# Final stage
FROM alpine:latest

# Install ca-certificates and timezone data
RUN apk --no-cache add ca-certificates tzdata wget

WORKDIR /root/

# Copy the binary from builder stage
COPY --from=builder /app/masktunnel .

# Expose the default port
EXPOSE 8080

# Add health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
  CMD wget --no-verbose --tries=1 --spider http://localhost:8080/ || exit 1

# Set entrypoint
ENTRYPOINT ["./masktunnel"]

# Default command
CMD ["-port", "8080"]