Firefox Syncserver: log requests

Without RUST_LOG the server only logs errors, so a token request Firefox gets rejected never shows up in the journal (#2335).

Author: MickLesk

install/firefox-syncserver-install.sh

@@ -46,6 +46,7 @@ SYNC_HOST=0.0.0.0
 SYNC_PORT=8000
 SYNC_MASTER_SECRET=$(openssl rand -hex 32)
 SYNC_HUMAN_LOGS=true
+RUST_LOG=info
 SYNC_SYNCSTORAGE__DATABASE_URL=postgres://syncserver:${PG_DB_PASS}@127.0.0.1:5432/syncserver
 SYNC_SYNCSTORAGE__GLEAN_ENABLED=false
 SYNC_TOKENSERVER__ENABLED=true