update .env example

.env.dist

@@ -8,3 +8,21 @@ DATABASE_NAME={db_name}
   
 # only for mongodb 
 DATABASE_URL={db_url}
+
+# STRING SESSION if not set it will be generated at startup
+STRINGSESSION={@string_session}
+
+# apiflash api key only for webshot plugin
+APIFLASH_KEY={@api_flash_key}
+
+# rmbg api key only for removebg plugin
+RMBG_KEY={@rmbg_key}
+
+# VT api key only for VirusTotal plugin
+VT_KEY={@vt_key}
+
+# gemini api key only for gemini plugin
+GEMINI_KEY={@gemini_key}
+
+# VCA api key only for vdxl[sdxl] plugin
+VCA_API_KEY={@vca_api_key}