add ticket purchase page

Co-authored-by: Jan-Marlon Leibl <jleibl@proton.me>
Reviewed-on: http://git.simonis.lol/projects/abiball/pulls/13
Reviewed-by: jank1619 <jan@kjan.email>

.env

@@ -1,26 +1,19 @@
-# In all environments, the following files are loaded if they exist,
-# the latter taking precedence over the former:
-#
-#  * .env                contains default values for the environment variables needed by the app
-#  * .env.local          uncommitted file with local overrides
-#  * .env.$APP_ENV       committed environment-specific defaults
-#  * .env.$APP_ENV.local uncommitted environment-specific overrides
-#
-# Real environment variables win over .env files.
-#
-# DO NOT DEFINE PRODUCTION SECRETS IN THIS FILE NOR IN ANY OTHER COMMITTED FILES.
-# https://symfony.com/doc/current/configuration/secrets.html
-#
-# Run "composer dump-env prod" to compile .env files for production use (requires symfony/flex >=1.2).
-# https://symfony.com/doc/current/best_practices.html#use-environment-variables-for-infrastructure-configuration
-
-###> symfony/framework-bundle ###
+### SYMFONY
 APP_ENV=dev
 APP_SECRET=
-###< symfony/framework-bundle ###
+###
 
-###> symfony/mailer ###
+### MAILER
 MAILER_DSN=smtp://${MAILER_USER:-null}:${MAILER_PASSWORD:-null}@${MAILER_HOST:-localhost}:${MAILER_PORT:-1025}
 CONTACT_MAIL=${CONTACT_MAIL:-contact@localhost}
 SENDER_MAIL=${SENDER_MAIL:-noreply@localhost}
-###< symfony/mailer ###
+###
+
+### DATABASE
+DATABASE_URL="postgresql://${DB_USER:-db}:${DB_PW:-db}@${DB_HOST:-db}:${DB_PORT:-5432}/${DB_NAME:-db}?serverVersion=16&charset=utf8"
+###
+
+### STRIPE
+STRIPE_PUBLIC_KEY=${STRIPE_PUBLIC_KEY}
+STRIPE_SECRET_KEY=${STRIPE_PUBLIC_KEY}
+###