feat : nginx에 cors 설정

.platform/nginx/01_nginx.config

@@ -1,10 +1,30 @@
 container_commands:
   01_reload_nginx:
     command: "service nginx reload"
+
 files:
-    "/etc/nginx/conf.d/proxy.conf":
-      mode: "000755"
-      owner: root
-      group: root
-      content: |
-        client_max_body_size 50M;
+  "/etc/nginx/conf.d/proxy.conf":
+    mode: "000755"
+    owner: root
+    group: root
+    content: |
+      client_max_body_size 50M;
+
+      server {
+        listen 80;
+
+        location /api/ {
+          if ($request_method = 'OPTIONS') {
+            add_header 'Access-Control-Allow-Origin' 'https://techeermarket.site';
+            add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
+            add_header 'Access-Control-Allow-Headers' 'Authorization, Content-Type, Access-Control-Allow-Origin';
+            add_header 'Access-Control-Allow-Credentials' 'true';
+            return 204;
+          }
+
+          add_header 'Access-Control-Allow-Origin' 'https://techeermarket.site';
+          add_header 'Access-Control-Allow-Credentials' 'true';
+
+          proxy_pass http://localhost:5000; # Spring Boot 애플리케이션이 실행 중인 포트
+        }
+      }