Add Docker & Kubernetes/Docker/Docker Compose/Gatus.md

Docker & Kubernetes/Docker/Docker Compose/Gatus.md

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+**Purpose**: Gatus Service Status Server.
+
+## Docker Configuration
+```jsx title="docker-compose.yml"
+version: "3.9"
+services:
+  postgres:
+    image: postgres
+    volumes:
+      - /srv/containers/gatus/db:/var/lib/postgresql/data
+    ports:
+      - "5432:5432"
+    env_file:
+      - stack.env
+    networks:
+        docker_network:
+          ipv4_address: 192.168.5.9
+
+  gatus:
+    image: twinproduction/gatus:latest
+    restart: always
+    ports:
+      - "8080:8080"
+    env_file:
+      - stack.env
+    volumes:
+      - /srv/containers/gatus/config:/config
+    depends_on:
+      - postgres
+    dns:      
+     - 192.168.3.25     
+     - 192.168.3.26  
+    networks:
+        docker_network:
+          ipv4_address: 192.168.5.8
+
+networks:
+  docker_network:
+    external: true
+
+```
+
+```jsx title=".env"
+N/A
+```
+
+## Traefik Reverse Proxy Configuration
+If the container does not run on the same host as Traefik, you will need to manually add configuration to Traefik's dynamic config file, outlined below.
+``` yaml
+http:
+  routers:
+    status-bunny-lab:
+      entryPoints:
+        - websecure
+      tls:
+        certResolver: letsencrypt
+      service: status-bunny-lab
+      rule: Host(`status.bunny-lab.io`)
+      middlewares:
+        - "auth-bunny-lab-io"  # Referencing the Keycloak Server
+
+  services:
+    status-bunny-lab:
+      loadBalancer:
+        servers:
+          - url: http://192.168.5.8:8080
+        passHostHeader: true
+```