fix: inject <base href> from base_path config; fix relative asset/nav links; add README

config/config.c

@@ -19,6 +19,7 @@ static void set_defaults(void) {
     strncpy(g_cfg.dl_dir_mov,    "/mnt/media/Movies",    sizeof(g_cfg.dl_dir_mov)-1);
     strncpy(g_cfg.template_dir,  "/usr/local/share/iptv-dl", sizeof(g_cfg.template_dir)-1);
     strncpy(g_cfg.data_dir,      "/var/lib/iptv-dl",     sizeof(g_cfg.data_dir)-1);
+    strncpy(g_cfg.base_path,     "",                     sizeof(g_cfg.base_path)-1);
     g_cfg.max_recv_speed = 20L * 1024 * 1024; /* 20 MiB/s */
 }
 
@@ -79,6 +80,7 @@ static int try_load(const char *path) {
     cfg_read_str(buf, "jellyfin_token",  g_cfg.jellyfin_token,  sizeof(g_cfg.jellyfin_token));
     cfg_read_str(buf, "template_dir",    g_cfg.template_dir,    sizeof(g_cfg.template_dir));
     cfg_read_str(buf, "data_dir",        g_cfg.data_dir,        sizeof(g_cfg.data_dir));
+    cfg_read_str(buf, "base_path",       g_cfg.base_path,       sizeof(g_cfg.base_path));
     g_cfg.port           = cfg_read_int(buf,  "port",            g_cfg.port);
     g_cfg.max_recv_speed = cfg_read_long(buf, "max_recv_speed",  g_cfg.max_recv_speed);
 

config/config.h

@@ -32,6 +32,7 @@ typedef struct {
     /* Paths */
     char template_dir[512];  /* dir containing header.html, footer.html, iptv.css, *.js */
     char data_dir[512];      /* dir for history.json, notifications.json */
+    char base_path[128];     /* URL prefix when behind reverse proxy, e.g. "/iptv" (no trailing slash) */
 
     /* Limits */
     long max_recv_speed;     /* bytes/sec, 0 = unlimited */