Fix #272: Do not write logs to file since that's not needed for both Docker and ./yii serve

[Copilot]

Ports yiisoft/app#443. FileTarget is unnecessary in both Docker and ./yii serve setups; stdout/stderr via StreamTarget is sufficient.

Changes

• composer.json — drop yiisoft/log-target-file dependency
• config/common/di/logger.php — remove FileTarget from logger targets
• public/index.php — replace FileTarget (writing to runtime/logs/app-container-building.log) with StreamTarget in the temporary error handler

// Before
(new FileTarget($root . '/runtime/logs/app-container-building.log'))->setLevels([...])

// After
(new StreamTarget())->setLevels([...])

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[Copilot]

Pull request overview

This PR removes file-based logging in favor of stream-based logging (stdout/stderr), aligning the app’s default logging behavior with Docker and ./yii serve environments.

Changes:

• Remove the yiisoft/log-target-file Composer dependency.
• Update DI logger configuration to use only StreamTarget.
• Switch the temporary error handler in public/index.php from FileTarget (runtime log file) to StreamTarget, and document the change in the changelog.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
composer.json	Drops the file log target dependency now that logging is stream-based.
config/common/di/logger.php	Removes FileTarget from the configured logger targets, leaving StreamTarget.
public/index.php	Replaces the temporary error-handler log target from file output to stream output.
CHANGELOG.md	Notes the behavioral change (no file logging) under the upcoming release section.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.70%. Comparing base (0694b6e) to head (242adc7).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #272   +/-   ##
=========================================
  Coverage     76.70%   76.70%           
  Complexity       52       52           
=========================================
  Files            16       16           
  Lines           176      176           
=========================================
  Hits            135      135           
  Misses           41       41           

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