## Purpose: Setup Reverse Proxy for your Application
```
                                               +----------------------------+
                                               | Target Server              |
                                               |                            |
                                               |    +---------+             |
                                               |    |         |             |
                                               |    | Traefik |             |
+---------------------+                        |    |         |             |
| Any Linux Computer  |                        |    +---------+             |
|                     |                        |       ^                    |
| +-------------+     |                        |       |                    |
| |             |     |  Setup Reverse Proxy   |  +----+------------------+ |
| | This        +-----+------------------------+->|                       | |
| | Automatical |     |  for your existing     |  | Reverse Proxy Setting | |
| | System      |<-+  |  application           |  | eg. www.domain.com    | |
| |             |  |  |                        |  |                       | |
| +-------------+  |  |                        |  +------+----------------+ |
|                  |  |                        |         |                  |
|                .env |                        |         v                  |
|                     |                        |     +-------------+        |
+---------------------+                        |     |             |        |
                                               |     | Existing    |        |
                                               |     | Application |        |
                                               |     |             |        |
                                               |     +-------------+        |
                                               |                            |
                                               +----------------------------+
```
- .env -- **parameters for your Application, Reverse Proxy and Target information**
- Assume your "Application" is already existing.
- If Traefik does not exist, will create it dynmaically, Otherwise, use exsiting one.
  - Remark: one Target Server has one unique Traefik instance running -- container name as traefik.
- All Application(s) must connect to docker network name **traefik-public** for container connection by expose port(s).

## Architecture

```
+-------------------+                     +-------------------+              
|   Local Host      |                     |  Proxy Server     |              
|                   |                     |                   |              
|  +-------------+  |    FRP Tunnel       |  +-------------+  |              
|  | Application |  | <-----------------> |  |   Traefik   |  |<--- Domains  
|  |  Service #1 |  |       Public IPs    |  | (Router)    |  |    HTTPS/TLS 
|  |             |  |       Port: 16999   |  |             |  |              
|  +-------------+  |                     |  +-------------+  |              
|                   |                     |                   |              
|  +-------------+  |                     |  +-------------+  |              
|  |   FRPC      |  |                     |  |   FRPS      |  |              
|  | (Client)    |  |                     |  | (Server)    |  |              
|  |             |  |                     |  |             |  |              
|  +-------------+  |                     |  +-------------+  |              
|                   |                     |                   |              
|                   |                     |  +-------------+  |              
|                   |                     |  | Application |  |              
|                   |                     |  |  Service #2 |  |              
|                   |                     |  |             |  |              
+-------------------+                     |  +-------------+  |              
                                          +-------------------+
```

## Run this System
- `./auto-sys-deploy.sh setup-rvs-prxy`
  - will apply the new `.env` setting to into traefik
    - null traefik before, create new and apply those new setting
    - OR already existing traefik, keep all old setting, then apply new setting