docker-compose: increase memory limit to avoid oom kill

docker-compose.yml

@@ -16,8 +16,8 @@ services:
     cap_drop: [ALL]
     security_opt: [no-new-privileges]
     cpus: 0.5
-    # > Memory cgroup out of memory: Killed process 430587 (bitcoind) total-vm:278720kB, [...]
-    mem_limit: 384m
+    # > Memory cgroup out of memory: Killed process 472277 (bitcoind) total-vm:403272kB, [...]
+    mem_limit: 512m
     restart: unless-stopped
 
 # https://docs.docker.com/compose/compose-file/compose-file-v2/