fix(docker): fix MySQL config not applied, wrong SMTP port, duplicate memory_limit

- docker/mysql/Dockerfile: add COPY mysql.conf /etc/mysql/conf.d/custom.cnf so
  innodb_use_native_aio=0 is actually applied (was silently ignored before)
- docker/app/php/custom.ini: remove duplicate memory_limit = 64M directive
  (was immediately overridden by the memory_limit = 512M line below it)
- packages/skeleton/app/.env.docker: fix SMTP_PORT from 2025 to 1025 (Mailpit's
  actual SMTP port); remove unused DB_ROOT_PASSWORD and ROOT_PASSWORD; set UF_MODE=debug

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: lcharette

CHANGELOG.md

@@ -10,6 +10,11 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+### Fixed
+- [Docker] Fix `.env.docker` `SMTP_PORT` from 2025 to 1025 (Mailpit's actual SMTP port).
+- [Docker] Remove unused `DB_ROOT_PASSWORD` and `ROOT_PASSWORD` variables from `.env.docker`.
+- [Docker] Set `UF_MODE=debug` (was empty) in `.env.docker`.
+
 ### Changed
 - `stylesheets_site.html.twig` now calls `vite_css_preload('main.ts')` before `vite_css()`, emitting `<link rel="preload" as="style">` hints for CSS files (requires `userfrosting/vite-php-twig` ^1.2.0).
 

app/.env.docker

@@ -1,22 +1,20 @@
 # Sample UserFrosting environment variables definition file for Docker environment.
 # Note that in production, it is strongly recommended that you set these variables directly in your environment instead.
 
-UF_MODE=
+UF_MODE=debug
 
 DB_CONNECTION=mysql
 DB_HOST=mysql
 DB_PORT=3306
 DB_NAME=userfrosting
 DB_USER=docker
 DB_PASSWORD=secret
-DB_ROOT_PASSWORD=secret
-ROOT_PASSWORD=secret
 
 MAIL_MAILER=smtp # Set to one of 'smtp', 'mail', 'qmail', 'sendmail'
 SMTP_HOST=mailpit
 SMTP_USER=relay@example.com
 SMTP_PASSWORD=password
-SMTP_PORT=2025
+SMTP_PORT=1025
 SMTP_SECURE=false
 SMTP_AUTH=false