38 lines
984 B
Docker
38 lines
984 B
Docker
# Production-hardened Dockerfile for auth-gate
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#
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# We use a multi-stage build to keep the final image small.
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# The build stage compiles the binary, and the runtime stage copies
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# only the binary and the required configuration.
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FROM golang:1.21-alpine AS builder
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WORKDIR /app
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COPY go.mod go.sum ./
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RUN go mod download
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COPY . .
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RUN CGO_ENABLED=0 GOOS=linux go build -o auth-gate .
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# Runtime stage
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FROM alpine:3.19
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WORKDIR /app
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# Create a non-root user (security best practice).
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RUN addgroup -S auth-gate && adduser -S auth-gate -G auth-gate
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# Copy the binary from the builder stage.
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COPY --from=builder /app/auth-gate .
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# Create directories for config and data.
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RUN mkdir -p /config /data
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# Set ownership so the non-root user can write to /data but not /config.
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RUN chown -R auth-gate:auth-gate /data && chown auth-gate:auth-gate /config
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# Switch to the non-root user.
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USER auth-gate
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# Expose the HTTP port.
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EXPOSE 8080
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# Start the service.
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ENTRYPOINT ["/app/auth-gate"]
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CMD [] |