fix(deploy): build server images with cgo

server/Dockerfile

@@ -1,22 +1,25 @@
 # syntax=docker/dockerfile:1
 
 # ─── Stage 1: Build Go binaries ───────────────────────────────────────────────
-FROM --platform=$BUILDPLATFORM golang:1.23-alpine AS builder
+FROM golang:1.23-alpine AS builder
 
-ARG SERVICE=tenant-api
-ARG TARGETOS=linux
-ARG TARGETARCH=amd64
+ARG TARGETOS
+ARG TARGETARCH
 
-RUN apk --no-cache add ca-certificates git
+RUN apk --no-cache add ca-certificates git build-base
 
 WORKDIR /app
 
 COPY go.mod go.sum ./
-RUN go mod download
+RUN --mount=type=cache,target=/go/pkg/mod \
+    go mod download
 
 COPY . .
 
-RUN CGO_ENABLED=0 GOOS=${TARGETOS} GOARCH=${TARGETARCH} \
+ARG SERVICE=tenant-api
+RUN --mount=type=cache,target=/go/pkg/mod \
+    --mount=type=cache,target=/root/.cache/go-build \
+    CGO_ENABLED=1 GOOS="${TARGETOS:-$(go env GOOS)}" GOARCH="${TARGETARCH:-$(go env GOARCH)}" \
     go build -trimpath -ldflags="-s -w" \
     -o /bin/service ./cmd/${SERVICE}