feat: Project Scaffold and Docker Packaging

.env.example

@@ -0,0 +1,11 @@
+# 10Backward configuration — placeholder values only. NEVER use real credentials here.
+
+MASTODON_BASE_URL=https://mastodon.example
+MASTODON_ACCESS_TOKEN=replace-me
+MASTODON_VISIBILITY=public
+SITE_URL=https://blog.example.com
+HASHTAGS=#throwback,#10backward
+THROWBACK_PREFIX=Throwback:
+RETRY_COUNT=3
+RUN_AT=09:00
+TZ=Europe/Berlin