Generated configs out of the repo: *.example.* templates only; configure.py refuses to apply over CHANGEME placeholders

A deploy copied mediamtx.yml (template) over the server's generated file and the next apply
wiped all streamers. Generated files are now gitignored so scp -r cannot clobber them.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

configure.py

@@ -8,6 +8,8 @@
                                       used by addCommunityMediaServer.sh)
 
 Reads  : Caddyfile (hostnames), mediamtx.yml (streamers), copyparty.conf (editors + admin), .env
+         (these are GENERATED on the server and gitignored; *.example.* in the repo are reference only —
+          never scp them over the live ones: that is how streamers got wiped once)
 Writes : Caddyfile, mediamtx.yml, copyparty.conf, dump-users.txt -> /etc/vanguard, .env (generated secrets +
          Discord bot token/guild), folders, restarts
 Set VG_DRY=1 to write files only (no sudo / docker / folders).
@@ -398,6 +400,10 @@ def run(cmd, **kw):
     return subprocess.call(cmd, **kw)
 
 def apply(domain, admin_pw, streamers, editors, auth_host="", watch_host="", discord_token=None, discord_guild=None, git_host="", bot_host="", live_host="", live_webhook=None):
+    if not streamers and Path("mediamtx.yml").exists() and "CHANGEME" in Path("mediamtx.yml").read_text():
+        print("\n!! mediamtx.yml contains CHANGEME placeholders — it looks like the repo template was copied over the")
+        print("   generated config. Applying now would leave NO streamers (OBS ingest and the dump button stop working).")
+        if not yes("   continue anyway?", False): print("aborted; add streamers first ([s] in the menu)"); sys.exit(1)
     print("\n== writing configs")
     write_env(watch_host, discord_token, discord_guild, git_host, bot_host, live_host, domain, live_webhook)
     write_caddy(domain, auth_host, watch_host, git_host, bot_host, live_host); write_mediamtx(streamers); write_copyparty(admin_pw, editors); write_dump_users(admin_pw, streamers); write_streamers_json(streamers)