♻️ Make exporter upload resources using backend management api

Instead of custon shared fs approach. This commit fixes the main
scalability issue of exporter removing the need of shared-fs
for make it work with multiple instances.

exporter/scripts/wait-and-start.sh

@@ -1,6 +1,10 @@
 #!/usr/bin/env bash
 
+SCRIPT_DIR=$(dirname $0);
+source $SCRIPT_DIR/../../backend/scripts/_env;
+
 bb -i '(babashka.wait/wait-for-port "localhost" 9630)';
 bb -i '(babashka.wait/wait-for-path "target/app.js")';
 sleep 2;
-node target/app.js
+
+exec node target/app.js