feat: initial dockerized 301 redirect to sag24.ru

nginx:alpine container, listens 8080, returns 301 -> https://sag24.ru$request_uri.
Mapped to host port 4083 on web.hhivp.com via docker-compose.

.gitignore

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+.DS_Store
+*.local
+docker-compose.override.yml
+secrets/

Dockerfile

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+# syntax=docker/dockerfile:1.7
+FROM nginx:1.27-alpine
+
+COPY nginx.conf /etc/nginx/nginx.conf
+
+EXPOSE 8080
+
+HEALTHCHECK --interval=30s --timeout=5s --retries=3 \
+    CMD wget -qO- http://127.0.0.1:8080/ -I 2>&1 | grep -q "301 Moved" || exit 1

README.md

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+# sysadmingroup-website
+
+`sysadmingroup.ru` — алиас-домен для `sag24.ru`.
+Контейнер `nginx:alpine` отдаёт `301 Moved Permanently` → `https://sag24.ru$request_uri`.
+
+## Деплой
+
+На `web.hhivp.com`:
+
+```bash
+cd /opt/docker/sites/sysadmingroup-ru
+git pull
+docker compose build
+docker compose up -d
+```
+
+Host nginx vhost (`/etc/nginx/conf.d/sysadmingroup.ru`) терминирует SSL и проксирует на `127.0.0.1:4083`.

docker-compose.yml

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+services:
+  sysadmingroup-ru:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    image: sysadmingroup-ru:latest
+    container_name: sysadmingroup-ru
+    restart: unless-stopped
+    ports:
+      - "127.0.0.1:4083:8080"
+    healthcheck:
+      test: ["CMD", "wget", "-qO-", "-I", "http://127.0.0.1:8080/"]
+      interval: 30s
+      timeout: 5s
+      retries: 3
+      start_period: 5s
+
+# Деплой на web (45.10.53.206):
+# - /opt/docker/sites/sysadmingroup-ru/  ← git clone сюда
+# Команды:
+#   cd /opt/docker/sites/sysadmingroup-ru && git pull && docker compose build && docker compose up -d

nginx.conf

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+worker_processes auto;
+error_log /dev/stderr warn;
+pid /var/run/nginx.pid;
+
+events {
+    worker_connections 256;
+}
+
+http {
+    server_tokens off;
+    access_log /dev/stdout combined;
+
+    server {
+        listen 8080 default_server;
+        server_name _;
+
+        location / {
+            return 301 https://sag24.ru$request_uri;
+        }
+    }
+}