Tracker checker: call health check endpoints

[josecelano]

Console command that runs some checks against running trackers. This PR only implements:

• Basic scaffolding for the new binary (console app).
• Make a request to the health check endpoints.

You can run it with:

cargo run --bin tracker_checker "./share/default/config/tracker_checker.json"

The configuration file contains the services you wan to check:

{
    "udp_trackers": [
        "127.0.0.1:6969"
    ],
    "http_trackers": [
        "http://127.0.0.1:7070"
    ],
    "health_checks": [
        "http://127.0.0.1:1313/health_check"
    ]
}

For the health_checks it only makes a request and shows OK if the response status was 200, otherwise, it shows the error.

[josecelano]

The current output is:

$ cargo run --bin tracker_checker "./share/default/config/tracker_checker.json"
    Finished dev [optimized + debuginfo] target(s) in 0.07s
     Running `target/debug/tracker_checker ./share/default/config/tracker_checker.json`
Running checks for trackers ...
UDP trackers ...
✓ - UDP tracker at 127.0.0.1:6969 is OK (TODO)
HTTP trackers ...
✓ - HTTP tracker at http://127.0.0.1:7070/ is OK (TODO)
Health checks ...
✓ - Health API at http://127.0.0.1:1313/health_check is OK

[josecelano]

ACK b2ef4e0

[codecov]

Codecov Report

Attention: 87 lines in your changes are missing coverage. Please review.

Comparison is base (7ea6fb0) 77.59% compared to head (b2ef4e0) 77.03%.

Files	Patch %	Lines
src/checker/service.rs	0.00%	24 Missing ⚠️
src/checker/console.rs	0.00%	20 Missing ⚠️
src/checker/app.rs	0.00%	18 Missing ⚠️
src/checker/config.rs	81.69%	13 Missing ⚠️
src/checker/logger.rs	66.66%	12 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #641      +/-   ##
===========================================
- Coverage    77.59%   77.03%   -0.56%     
===========================================
  Files          125      130       +5     
  Lines         8349     8519     +170     
===========================================
+ Hits          6478     6563      +85     
- Misses        1871     1956      +85     

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