feat: add shared observer location with opt-out

app.py

@@ -27,7 +27,7 @@ from typing import Any
 
 from flask import Flask, render_template, jsonify, send_file, Response, request,redirect, url_for, flash, session
 from werkzeug.security import check_password_hash
-from config import VERSION, CHANGELOG
+from config import VERSION, CHANGELOG, SHARED_OBSERVER_LOCATION_ENABLED
 from utils.dependencies import check_tool, check_all_dependencies, TOOL_DEPENDENCIES
 from utils.process import cleanup_stale_processes
 from utils.sdr import SDRFactory
@@ -271,15 +271,22 @@ def login():
     return render_template('login.html', version=VERSION)
 
 @app.route('/')
-def index() -> str:
-    tools = {
-        'rtl_fm': check_tool('rtl_fm'),
-        'multimon': check_tool('multimon-ng'),
-        'rtl_433': check_tool('rtl_433'),
-        'rtlamr': check_tool('rtlamr')
-    }
-    devices = [d.to_dict() for d in SDRFactory.detect_devices()]
-    return render_template('index.html', tools=tools, devices=devices, version=VERSION, changelog=CHANGELOG)
+def index() -> str:
+    tools = {
+        'rtl_fm': check_tool('rtl_fm'),
+        'multimon': check_tool('multimon-ng'),
+        'rtl_433': check_tool('rtl_433'),
+        'rtlamr': check_tool('rtlamr')
+    }
+    devices = [d.to_dict() for d in SDRFactory.detect_devices()]
+    return render_template(
+        'index.html',
+        tools=tools,
+        devices=devices,
+        version=VERSION,
+        changelog=CHANGELOG,
+        shared_observer_location=SHARED_OBSERVER_LOCATION_ENABLED,
+    )
 
 
 @app.route('/favicon.svg')