update environment configuration for local development, enhance database initialization, and improve Nginx routing for admin access

infrastructure/nginx/nginx.conf

@@ -3,6 +3,9 @@ events {
 }
 
 http {
+    include /etc/nginx/mime.types;
+    default_type application/octet-stream;
+
     resolver 127.0.0.11 ipv6=off valid=30s;
 
     map $http_upgrade $connection_upgrade {
@@ -24,6 +27,18 @@ http {
         root /srv/frontend;
         index index.html;
 
+        location = /admin {
+            return 301 /admin/;
+        }
+
+        location /admin/ {
+            try_files $uri $uri/ /admin/index.html;
+        }
+
+        location /assets/ {
+            try_files $uri =404;
+        }
+
         # Serve static frontend
         location / {
             try_files $uri $uri/ /index.html;