build(api): remove unused dependencies after building API on Railway

Author: jonahsnider

railway.json

@@ -2,7 +2,7 @@
 	"$schema": "https://railway.app/railway.schema.json",
 	"build": {
 		"builder": "NIXPACKS",
-		"buildCommand": "yarn workspace @interval.so/api build"
+		"buildCommand": "yarn workspace @interval.so/api build && yarn workspaces focus --production @interval.so/api"
 	},
 	"deploy": {
 		"healthcheckPath": "/health",