kea: Build stork natively

Author: hanazuki

kea/Dockerfile

@@ -20,7 +20,7 @@ RUN --mount=type=cache,target=/usr/local/cargo/registry \
 
 ###
 
-FROM --platform=$BUILDPLATFORM $BASE as build-stork
+FROM $BASE as build-stork
 
 RUN apt-get update \
     && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends git rake build-essential wget unzip python3
@@ -34,10 +34,6 @@ ENV GOPATH=/build/go
 RUN --mount=type=cache,dst=/build/stork/tools \
     rake build:agent
 
-ENV GOOS=linux
-ENV GOARCH=arm64
-ENV CGO_ENABLED=0
-
 RUN --mount=type=cache,dst=/build/stork/tools \
     ../tools/golang/go/bin/go install ./cmd/stork-agent
 
@@ -67,7 +63,7 @@ RUN apt-get update \
     && apt-get clean && rm -rf /var/lib/apt/lists/*
 
 COPY --from=build-healthz /app/bin/healthz /app/healthzd
-COPY --from=build-stork /build/go/bin/linux_arm64/stork-agent /app/stork-agent
+COPY --from=build-stork /build/go/bin/stork-agent /app/stork-agent
 COPY run.sh /app/run.sh
 COPY choose_dhcp_server_id.rb /app/choose_dhcp_server_id.rb
 COPY --from=config /app/kea-ctrl-agent.json /app/kea-ctrl-agent.json