remove ALB dependency, Nginx handles SSL and HTTP redirect directly

docker-compose.prod.yml

@@ -9,8 +9,10 @@ services:
     container_name: tinyurl-nginx
     ports:
       - "80:80"
+      - "443:443"
     volumes:
       - ./infra/nginx/nginx.prod.conf:/etc/nginx/nginx.conf:ro
+      - /etc/letsencrypt:/etc/letsencrypt:ro
     depends_on:
       app:
         condition: service_healthy

infra/nginx/nginx.prod.conf

@@ -6,19 +6,32 @@ http {
     # -----------------------------------------------------------------------
     # Real IP Resolution
     #
-    # Traffic path: Client → Cloudflare → ALB → nginx
-    # Without this, $remote_addr = ALB private IP (10.x.x.x) for every request.
-    # Rate limiting keyed on ALB IP = all users share one limit = broken.
+    # Traffic path: Client → Cloudflare → nginx (no ALB)
+    # Without this, $remote_addr = Cloudflare edge IP for every request.
+    # Rate limiting keyed on Cloudflare IP = all users share one limit = broken.
     #
-    # set_real_ip_from: trust the VPC (ALB) to forward the real client IP.
+    # set_real_ip_from: trust Cloudflare's published IP ranges.
     # real_ip_header:   read real client IP from Cloudflare's CF-Connecting-IP.
     # real_ip_recursive: strip known proxy IPs from the chain to find the origin.
     #
     # After this, $remote_addr = actual client IP for all directives below.
+    # Cloudflare IP ranges: https://www.cloudflare.com/ips/
     # -----------------------------------------------------------------------
-    set_real_ip_from 10.0.0.0/8;
-    set_real_ip_from 172.16.0.0/12;
-    set_real_ip_from 192.168.0.0/16;
+    set_real_ip_from 173.245.48.0/20;
+    set_real_ip_from 103.21.244.0/22;
+    set_real_ip_from 103.22.200.0/22;
+    set_real_ip_from 103.31.4.0/22;
+    set_real_ip_from 141.101.64.0/18;
+    set_real_ip_from 108.162.192.0/18;
+    set_real_ip_from 190.93.240.0/20;
+    set_real_ip_from 188.114.96.0/20;
+    set_real_ip_from 197.234.240.0/22;
+    set_real_ip_from 198.41.128.0/17;
+    set_real_ip_from 162.158.0.0/15;
+    set_real_ip_from 104.16.0.0/13;
+    set_real_ip_from 104.24.0.0/14;
+    set_real_ip_from 172.64.0.0/13;
+    set_real_ip_from 131.0.72.0/22;
     real_ip_header CF-Connecting-IP;
     real_ip_recursive on;
 
@@ -83,9 +96,21 @@ http {
     gzip_min_length 1024;
     gzip_types text/plain text/css text/xml text/javascript application/x-javascript application/xml+rss application/json;
 
+    # HTTP → HTTPS redirect
     server {
         listen 80;
         server_name go.buffden.com;
+        return 301 https://$host$request_uri;
+    }
+
+    server {
+        listen 443 ssl;
+        server_name go.buffden.com;
+
+        ssl_certificate     /etc/letsencrypt/live/go.buffden.com/fullchain.pem;
+        ssl_certificate_key /etc/letsencrypt/live/go.buffden.com/privkey.pem;
+        ssl_protocols       TLSv1.2 TLSv1.3;
+        ssl_prefer_server_ciphers on;
 
         # -------------------------------------------------------------------
         # Block malicious scanner tools by User-Agent
@@ -213,9 +238,8 @@ http {
         }
 
         # -------------------------------------------------------------------
-        # ALB Health Check — must be before the /actuator/ block
-        # ALB targets port 80 on EC2 and checks this path every 30s.
-        # If this returns anything other than 200, the target goes Unhealthy.
+        # Health Check endpoint — must be before the /actuator/ block
+        # Used by monitoring and CI/CD deploy verification.
         # -------------------------------------------------------------------
         location = /actuator/health {
             proxy_pass http://app:8080;