Prepare update + change dockerfile

[Astro-Otter-Space]

Upgrade code to PHP 8.2, adding RectorPHP rules for code quality

[codecov]

Codecov Report

Merging #27 (5b3f1dc) into master (f399a78) will increase coverage by 8.02%.
The diff coverage is 89.47%.

Additional details and impacted files

@@             Coverage Diff              @@
##             master      #27      +/-   ##
============================================
+ Coverage     84.10%   92.13%   +8.02%     
- Complexity      127      130       +3     
============================================
  Files            18       18              
  Lines           302      305       +3     
============================================
+ Hits            254      281      +27     
+ Misses           48       24      -24     

Files	Coverage Δ
src/GuzzleSingleton.php	100.00% <ø> (ø)
src/Response/DTO/AstrobinError.php	100.00% <100.00%> (ø)
src/Response/DTO/Collection/ListCollection.php	100.00% <ø> (+100.00%)	⬆️
src/Response/DTO/Collection/ListImages.php	100.00% <ø> (ø)
src/Response/DTO/Collection/ListToday.php	100.00% <ø> (ø)
src/Response/DTO/Item/Collection.php	100.00% <100.00%> (+100.00%)	⬆️
src/Response/DTO/Item/Image.php	100.00% <100.00%> (+100.00%)	⬆️
src/Response/EntityFactory.php	100.00% <ø> (ø)
src/Services/GetCollection.php	100.00% <ø> (ø)
src/Services/GetImage.php	100.00% <100.00%> (ø)
... and 4 more

... and 1 file with indirect coverage changes

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