update repository references and improve script handling

proxy/rootfs/etc/nginx/templates/ingress.gtpl

@@ -0,0 +1,14 @@
+server {
+    listen 3000 default_server;
+
+    include /etc/nginx/includes/server_params.conf;
+
+    location / {
+        allow   172.30.32.2;
+        deny    all;
+
+        proxy_pass http://backend;
+        proxy_set_header X-Ingress-Path {{ .entry }};
+        include /etc/nginx/includes/proxy_params.conf;
+    }
+}

proxy/rootfs/etc/nginx/templates/upstream.gtpl

@@ -0,0 +1,3 @@
+upstream backend {
+    server {{ .server }};
+}