build: move Dockerfile for httpserver to build/ dir

build/package/httpserver/Dockerfile

@@ -0,0 +1,30 @@
+# syntax=docker/dockerfile:1
+
+ARG ALPINE_VERSION=3.19
+
+FROM --platform=${BUILDPLATFORM} golang:1.22-alpine${ALPINE_VERSION} AS builder
+
+ARG BUILDPLATFORM
+
+WORKDIR /build
+
+COPY ../../../go.mod go.sum ./
+
+RUN go mod download
+
+COPY ../../.. .
+
+ARG TARGETOS
+ARG TARGETARCH
+
+RUN CGO_ENABLED=0 GOOS=$TARGETOS GOARCH=$TARGETARCH go build -o yggdrasil ./cmd/yggdrasil
+
+FROM alpine:${ALPINE_VERSION} AS runtime
+
+WORKDIR /srv
+
+RUN apk add --no-cache ca-certificates
+
+COPY --from=builder /build/yggdrasil .
+
+CMD ["/srv/yggdrasil"]