feat: add reusable nextjs-deploy and nextjs-nginx-conf workflows

.gitea/templates/nginx-nextjs-site.conf.template

@@ -0,0 +1,37 @@
+# Kalpasys – generated by nextjs-nginx-conf.yaml
+server {
+    listen 80;
+    server_name {{DOMAIN}};
+    return 301 https://$host$request_uri;
+}
+
+server {
+    listen 443 ssl;
+    server_name {{DOMAIN}};
+
+    ssl_certificate /etc/letsencrypt/live/{{DOMAIN}}/fullchain.pem;
+    ssl_certificate_key /etc/letsencrypt/live/{{DOMAIN}}/privkey.pem;
+    include /etc/letsencrypt/options-ssl-nginx.conf;
+    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem;
+
+    error_page 502 503 504 /maintenance.html;
+
+    location = /maintenance.html {
+        root /var/www/errors;
+        internal;
+    }
+
+    location / {
+        proxy_intercept_errors on;
+        proxy_pass http://127.0.0.1:{{PORT}};
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection 'upgrade';
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-Host $host;
+        proxy_cache_bypass $http_upgrade;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+    }
+}