Created example env, updated docker-compose, added valkey to supervisord

supervisor/supervisord.conf

@@ -26,3 +26,13 @@ stdout_logfile_maxbytes=0
 stderr_logfile=/dev/stderr
 stderr_logfile_maxbytes=0
 stopsignal=QUIT
+
+[program:valkey]
+command=/usr/bin/valkey-server --bind 127.0.0.1 --port 6379 --save "" --appendonly no
+autostart=true
+autorestart=true
+stdout_logfile=/dev/stdout
+stdout_logfile_maxbytes=0
+stderr_logfile=/dev/stderr
+stderr_logfile_maxbytes=0
+stopsignal=TERM