increase min recommended worker specs

Author: nicktrn

docs/self-hosting/docker.mdx

@@ -49,8 +49,8 @@ This machine will host the webapp, postgres, redis, and related services.
 
 This machine will host the supervisor and all of the runs.
 
-- 2+ vCPU
-- 4+ GB RAM
+- 4+ vCPU
+- 8+ GB RAM
 
 How many workers and resources you need will depend on your workloads and concurrency requirements.