Resolve "Make documentation multi-versioned"

Closes #41 (closed)

pages/main.py

+import os
+
 ragconnectVersionFileName = '../ragconnect.base/src/main/resources/ragConnectVersion.properties'
 
 
 def get_version():
+    if os.environ.get('CI_COMMIT_BRANCH', 'unknown') == 'dev':
+        return 'dev'
     with open(ragconnectVersionFileName) as ragconnectVersionFile:
         versionFileContent = ragconnectVersionFile.read()
     return versionFileContent[versionFileContent.rindex('version=') + 8:].strip()