feat: Environment Configuration and Logging Baseline

.env.example

@@ -2,10 +2,10 @@
 
 MASTODON_BASE_URL=https://mastodon.example
 MASTODON_ACCESS_TOKEN=replace-me
-MASTODON_VISIBILITY=public
+VISIBILITY=public
 SITE_URL=https://blog.example.com
 HASHTAGS=#throwback,#10backward
-THROWBACK_PREFIX=Throwback:
-RETRY_COUNT=3
+THROWNBACK_PREFIX=Throwback:
+MAX_RETRIES=3
 RUN_AT=09:00
 TZ=Europe/Berlin