go project - add a migration and rename the dockerfiles so that Go is the primary

go/cmd/server/main.go

@@ -0,0 +1,65 @@
+package main
+
+import (
+	"encoding/csv"
+	"fmt"
+	"io"
+	"log"
+	"net/http"
+	"os"
+
+	"github.com/michaeldileo/SafelyYouCodingChallenge/internal/api"
+	"github.com/michaeldileo/SafelyYouCodingChallenge/internal/store"
+)
+
+func main() {
+	deviceIDs, err := loadDeviceIDs("devices.csv")
+	if err != nil {
+		log.Fatalf("load devices: %v", err)
+	}
+
+	s := store.New(deviceIDs)
+	log.Printf("loaded %d known devices", len(deviceIDs))
+
+	srv := api.NewServer(s)
+
+	addr := ":6733"
+	fmt.Println("listening on", addr)
+	if err := http.ListenAndServe(addr, srv.Handler()); err != nil {
+		log.Fatal(err)
+	}
+}
+
+// loadDeviceIDs reads devices.csv (header + one device_id per row).
+// Lives in main on purpose: startup I/O stays at the process edge;
+// the store only receives already-parsed IDs.
+func loadDeviceIDs(path string) ([]store.DeviceID, error) {
+	f, err := os.Open(path)
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	r := csv.NewReader(f)
+
+	// Skip header: device_id
+	if _, err := r.Read(); err != nil {
+		return nil, fmt.Errorf("read header: %w", err)
+	}
+
+	var ids []store.DeviceID
+	for {
+		record, err := r.Read()
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			return nil, err
+		}
+		if len(record) == 0 || record[0] == "" {
+			continue
+		}
+		ids = append(ids, store.DeviceID(record[0]))
+	}
+	return ids, nil
+}