fix: oauth2 로그인 요청에 대한 nginx 설정

- nginx 설정에 oauth2 로그인 요청 부분이 빠져있어 이를 추가함
- frontend로 라우팅해주는 부분도 불필요하여 삭제

nginx/default.conf

@@ -9,10 +9,6 @@ upstream backendAlive {
     keepalive_timeout 30m;
 }
 
-upstream frontend {
-    server host.docker.internal:5173;
-}
-
 server {
     server_name localhost;
     listen 80;
@@ -26,7 +22,7 @@ server {
         add_header 'Access-Control-Allow-Credentials' 'true';
     }
 
-    location ~ /(api|imgs) {
+    location ~ /(api|imgs|oauth2|login) {
         # preflight response
         if ($request_method = 'OPTIONS') {
             add_header 'Access-Control-Allow-Origin' 'http://localhost:5173';
@@ -39,6 +35,10 @@ server {
         rewrite ^/(.*)$ /$1 break;
 
         proxy_pass http://backend/$1$is_args$args;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Scheme $scheme;
+        proxy_set_header X-Auth-Request-Redirect $scheme://$host$request_uri;
         add_header 'Access-Control-Allow-Origin' 'http://localhost:5173' always;
         add_header 'Access-Control-Allow-Credentials' 'true';
     }
@@ -53,10 +53,4 @@ server {
         add_header 'Access-Control-Allow-Origin' 'http://localhost:5173' always;
         add_header 'Access-Control-Allow-Credentials' 'true';
     }
-
-    location / {
-        proxy_pass http://frontend;
-        proxy_set_header Connection '';
-        proxy_http_version 1.1;
-    }
 }