Add setup for heroku

Procfile

@@ -0,0 +1 @@
+connector-mango: ./heroku/run.sh

heroku/run.sh

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+#!/bin/bash
+
+echo "$CONFIG_FILE" > config.toml
+echo "$TLS_CA" > ca.pem
+echo "$TLS_CLIENT" > client.pem
+
+while true
+do
+	target/release/solana-accountsdb-connector-mango config.toml
+	sleep 5
+done