Allow CGO in Docker build

go-sqlite3 requires cgo to work

Dockerfile

@@ -1,8 +1,16 @@
+FROM --platform=$BUILDPLATFORM tonistiigi/xx AS xx
+
 FROM --platform=$BUILDPLATFORM golang:1.21-alpine AS build
 
 LABEL authors="kbruen"
 LABEL org.opencontainers.image.source=https://github.com/dancojocaru2000/CfrTrainInfoTelegramBot
 
+RUN echo "@testing https://dl-cdn.alpinelinux.org/alpine/edge/testing" >> /etc/apk/repositories
+RUN apk add zig@testing
+COPY --from=xx / /
+ARG TARGETPLATFORM
+ENV CGO_ENABLED=1
+
 WORKDIR /app
 
 COPY go.mod .
@@ -11,8 +19,9 @@ RUN go mod download
 
 COPY main.go ./
 COPY pkg ./pkg/
-ARG TARGETOS TARGETARCH
+ARG TARGETOS
-RUN CGO_ENABLED=0 GOOS=$TARGETOS GOARCH=$TARGETARCH go build -o server
+ARG TARGETARCH
+RUN GOOS=$TARGETOS GOARCH=$TARGETARCH CGO_CFLAGS="-D_LARGEFILE64_SOURCE" CC="zig cc -target $(xx-info march)-$(xx-info os)-$(xx-info libc)" CXX="zig c++ -target $(xx-info march)-$(xx-info os)-$(xx-info libc)" go build -o server && xx-verify server
 
 FROM scratch
 COPY --from=build /etc/ssl/certs /etc/ssl/certs