[bug-ma3v4dg2c9y3] build: bundle BIRD 2.19.1

Dockerfile

@@ -20,8 +20,34 @@ RUN CGO_ENABLED=0 go build -trimpath \
         -ldflags="-s -w -X main.gitSHA=${GIT_SHA}" \
         -o /out/flock-installer ./cmd/flock-installer
 
+FROM alpine:3.21 AS bird-build
+
+ARG BIRD_VERSION=2.19.1
+ARG BIRD_SHA256=e91aedac07da4f2718f269f969f65dbcd12f4b58248a784fd32e587b7b4dd7e4
+
+RUN apk add --no-cache \
+        bison \
+        build-base \
+        curl \
+        flex \
+        libssh-dev \
+        linux-headers \
+        ncurses-dev \
+        readline-dev \
+ && curl -fsSL --proto '=https' --tlsv1.2 \
+        "https://bird.nic.cz/download/bird-${BIRD_VERSION}.tar.gz" \
+        -o /tmp/bird.tar.gz \
+ && echo "${BIRD_SHA256}  /tmp/bird.tar.gz" | sha256sum -c - \
+ && tar -xzf /tmp/bird.tar.gz -C /tmp \
+ && cd "/tmp/bird-${BIRD_VERSION}" \
+ && ./configure --prefix=/usr --sysconfdir=/etc/bird --runstatedir=/run/bird \
+ && make -j"$(nproc)" \
+ && make DESTDIR=/out install
+
 FROM alpine:3.21
-RUN apk add --no-cache iproute2 bird nftables ca-certificates
+RUN apk add --no-cache iproute2 nftables ca-certificates libssh ncurses-libs readline
+COPY --from=bird-build /out/usr/sbin/bird /usr/sbin/bird
+COPY --from=bird-build /out/usr/sbin/birdc /usr/sbin/birdc
 COPY --from=build /out/flock           /usr/local/bin/flock
 COPY --from=build /out/flock-agent     /usr/local/bin/flock-agent
 COPY --from=build /out/flock-installer /usr/local/bin/flock-installer