🔧(project) proxy Keycloak with nginx

Backend and Frontend send requests to Keycloak through Nginx.

Thus, all requests from frontend and backend shared a same host
when received by Keycloak.

Otherwise, the flow is initiated from http://localhost:8080. When the Backend
calls token endpoint from Keycloak container at http://keycloak:8080,
the JWT token issuer and sender are mismatching.

docker/files/etc/nginx/conf.d/default.conf

@@ -32,3 +32,17 @@ server {
   }
 }
 
+
+server {
+    listen 8083;
+    server_name localhost;
+    charset utf-8;
+
+    location / {
+        proxy_pass http://keycloak:8080;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    }
+}
+