Add Version History

Version-History.md

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+<h1><strong>Version History</strong></h1>
+
+<p>
+  This page documents all released versions of the 
+  <strong>Managed Valheim</strong> server container, including major changes, 
+  fixes, and improvements. Versioning follows a structured 
+  <code>MAJOR.MINOR.PATCH.BUILD</code> format to ensure clarity and stability 
+  across TrueNAS SCALE deployments.
+</p>
+
+<hr>
+
+<h2><strong>Version 1.0.1.1</strong></h2>
+
+<p><em>Released: October 2026</em></p>
+
+<ul>
+  <li><strong>Added configurable backup interval</strong><br>
+      Introduced <code>BACKUP_INTERVAL</code> environment variable 
+      (default: 21600 seconds / 6 hours).
+  </li>
+
+  <li><strong>Added backup retention control</strong><br>
+      Introduced <code>BACKUP_RETENTION_DAYS</code> environment variable 
+      (default: 7 days).
+  </li>
+
+  <li><strong>Implemented automatic backup pruning</strong><br>
+      Old backups are now removed based on retention settings.
+  </li>
+
+  <li><strong>Updated entrypoint</strong><br>
+      Backup loop now uses <code>BACKUP_INTERVAL</code> instead of a 
+      hard-coded 3600 seconds.
+  </li>
+
+  <li><strong>Updated backup script</strong><br>
+      Added pruning logic to <code>backup.sh</code>.
+  </li>
+
+  <li><strong>Dockerfile improvements</strong><br>
+      Added default values for new backup-related environment variables.
+  </li>
+
+  <li><strong>TrueNAS SCALE app updated</strong><br>
+      Environment variables added and version tag switched to 
+      <code>1.0.1.1</code>.
+  </li>
+</ul>
+
+<hr>
+
+<h2><strong>Version 1.0.1.0</strong></h2>
+
+<p><em>Released: September 2026</em></p>
+
+<ul>
+  <li><strong>Stabilized BepInEx installation</strong><br>
+      Improved ZIP validation and extraction logic.
+  </li>
+
+  <li><strong>Improved wrapper script generation</strong><br>
+      Ensured consistent server launch parameters.
+  </li>
+
+  <li><strong>Enhanced SteamCMD update flow</strong><br>
+      Clean install directory (<code>/opt/valheim_base</code>) now fully 
+      isolated from modded runtime directory.
+  </li>
+
+  <li><strong>General reliability improvements</strong><br>
+      Reduced startup errors and improved logging clarity.
+  </li>
+</ul>
+
+<hr>
+
+<h2><strong>Version 1.0.0.0</strong></h2>
+
+<p><em>Released: Initial Release</em></p>
+
+<ul>
+  <li><strong>Initial container architecture</strong><br>
+      Introduced clean + modded directory separation.
+  </li>
+
+  <li><strong>Automatic SteamCMD installation</strong><br>
+      Server updates itself on every startup.
+  </li>
+
+  <li><strong>Automatic BepInEx installation</strong><br>
+      Download, validation, extraction, and patching included.
+  </li>
+
+  <li><strong>Managed wrapper script</strong><br>
+      Ensures consistent server startup with correct parameters.
+  </li>
+
+  <li><strong>Basic backup system</strong><br>
+      Hourly backups without pruning (later replaced).
+  </li>
+
+  <li><strong>TrueNAS SCALE compatibility</strong><br>
+      Volume mapping, port exposure, and environment variable support.
+  </li>
+</ul>
+
+<hr>
+
+<h2><strong>Versioning Policy</strong></h2>
+
+<p>
+  Managed Valheim uses a structured versioning format:
+</p>
+
+<pre><code>MAJOR.MINOR.PATCH.BUILD</code></pre>
+
+<ul>
+  <li><strong>MAJOR</strong> — Breaking changes or architectural shifts</li>
+  <li><strong>MINOR</strong> — New features or enhancements</li>
+  <li><strong>PATCH</strong> — Bug fixes or stability improvements</li>
+  <li><strong>BUILD</strong> — Internal build increments or deployment tags</li>
+</ul>
+
+<p>
+  TrueNAS SCALE deployments should always use pinned versions for stability.
+</p>
+
+<hr>
+
+<h2><strong>Next Steps</strong></h2>
+
+<ul>
+  <li><a href="Home">Home</a></li>
+  <li><a href="Quick Start">Quick Start</a></li>
+  <li><a href="Installation">Installation</a></li>
+  <li><a href="Modding Guide">Modding Guide</a></li>
+  <li><a href="Backup & Restore">Backup & Restore</a></li>
+  <li><a href="Troubleshooting">Troubleshooting</a></li>
+</ul>
+
+<p>
+  This version history will be updated as new releases are published.
+</p>