Better Dockerfile

CHANGELOG.md

@@ -24,6 +24,8 @@ Next
 - Report received ICMPv6 error messages (#391, thanks @auerswal)
 - Suppress duplicate reports in count mode with -q, --quiet or -Q, --squiet
   (#392, thanks @gsnw-sebast and @auerswal)
+- Switch to alpine-based multi-stage Docker build to reduce image size and improve build performance
+  Add OpenContainers-compatible labels (#399)
 
 fping 5.3 (2025-01-02)
 ======================

contrib/Dockerfile

@@ -1,17 +1,25 @@
-FROM debian:stable
+FROM alpine:3.22.1 AS builder
 
-# Base
-RUN apt-get update && apt-get install -y \
-  build-essential \
+RUN apk add --no-cache \
+  build-base \
   automake \
   autoconf \
   m4
 
-# Add source code
 COPY ./ /app
-
-# Compile
 WORKDIR /app
-RUN autoreconf --install
-RUN ./configure && make && make install
-ENTRYPOINT ["fping"]
+RUN autoreconf --install && ./configure && make
+
+FROM alpine:3.22.1
+
+# OCI annotations
+LABEL org.opencontainers.image.title="fping" \
+      org.opencontainers.image.authors="fping Community" \
+      org.opencontainers.image.description="High performance ping tool" \
+      org.opencontainers.image.base.name="docker.io/library/alpine:3.22.1" \
+      org.opencontainers.image.source="https://github.com/schweikert/fping" \
+      org.opencontainers.image.documentation="https://fping.org/fping.8.html"
+
+COPY --from=builder /app/src/fping /usr/local/bin/fping
+
+ENTRYPOINT ["fping"]