add dummy routes and handlers and update makefile

service_a/internal/domains/meteo/handlers.go

@@ -0,0 +1,20 @@
+package meteo
+
+import (
+	"fmt"
+	"net/http"
+)
+
+type Handler struct{}
+
+func NewHandler() *Handler {
+	return &Handler{}
+}
+
+func (h *Handler) IngestCSV(w http.ResponseWriter, r *http.Request) {
+	fmt.Fprintf(w, "hello from csv")
+}
+
+func (h *Handler) IngestExcel(w http.ResponseWriter, r *http.Request) {
+	fmt.Fprintf(w, "hello from excel")
+}