merge: Add separate redis for rate limit (!908)

View MR for information: https://activitypub.software/TransFem-org/Sharkey/-/merge_requests/908

Approved-by: dakkar <dakkar@thenautilus.net>
Approved-by: Marie <github@yuugi.dev>

.config/ci.yml

@@ -103,6 +103,16 @@ redis:
 #  #prefix: example-prefix
 #  #db: 1
 
+#redisForRateLimit:
+#  host: localhost
+#  port: 6379
+#  #family: 0  # 0=Both, 4=IPv4, 6=IPv6
+#  #pass: example-pass
+#  #prefix: example-prefix
+#  #db: 1
+#  # You can specify more ioredis options...
+#  #username: example-username
+
 #   ┌───────────────────────────────┐
 #───┘ Fulltext search configuration └─────────────────────────────