Add Aether files and directories from helm-charts

Change-Id: I2edb76ebbf8f1da147f760c0fa4618219c49b6cc
diff --git a/omec/omec-user-plane/templates/config/_spgwu.json.tpl b/omec/omec-user-plane/templates/config/_spgwu.json.tpl
new file mode 100644
index 0000000..ba36cc7
--- /dev/null
+++ b/omec/omec-user-plane/templates/config/_spgwu.json.tpl
@@ -0,0 +1,12 @@
+{
+  "ue_cidr": {{ .Values.networks.ue.subnet | quote }},
+  "enb_cidr": {{ .Values.networks.enb.subnet | quote }},
+  "s1u": {
+    "ifname": {{ .Values.config.spgwu.s1u.device | quote }}
+  },
+  "sgi": {
+    "ifname": {{ .Values.config.spgwu.sgi.device | quote }}
+  },
+  "workers": {{ .Values.config.spgwu.workers }},
+  "max_sessions": {{ .Values.config.spgwu.maxSessions }}
+}