[refactor/#83] 서버 스레드 개수 조절 설정

Author: sejoon00

src/main/resources/application-server.yml

@@ -0,0 +1,8 @@
+server:
+  tomcat:
+    accept-count: 100
+    max-connections: 8192
+
+    threads:
+      max: 300
+      min-spare: 10

src/main/resources/application.yml

@@ -8,6 +8,7 @@ spring:
     include:
       - aws
       - security
+      - server
   mvc:
     ignore-default-favicon: true