fix(traefik): regenerate static config at runtime, fix dir mount issue

DinD's Docker daemon creates bind-mounted files as directories when they
don't exist. Now traefik-start regenerates both traefik.yml and dynamic.yml
at runtime, fixing the directory issue for both files.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: z4nr34l

src/traefik/devcontainer-feature.json

@@ -1,6 +1,6 @@
 {
   "id": "traefik",
-  "version": "1.2.0",
+  "version": "1.3.0",
   "name": "Traefik Reverse Proxy",
   "description": "Traefik reverse proxy with subdomain routing to local services",
   "documentationURL": "https://doc.traefik.io/traefik/",

src/traefik/install.sh

@@ -69,10 +69,31 @@ source "$CONFIG_DIR/feature.env"
 # TRAEFIK_DOMAIN env var overrides the default domain
 DOMAIN="${TRAEFIK_DOMAIN:-$DEFAULT_DOMAIN}"
 
-# Fix: Docker bind mount may have created dynamic.yml as a directory
-if [ -d "$CONFIG_DIR/dynamic.yml" ]; then
-  sudo rm -rf "$CONFIG_DIR/dynamic.yml"
-fi
+# Fix: Docker bind mount may have created config files as directories
+for f in "$CONFIG_DIR/dynamic.yml" "$CONFIG_DIR/traefik.yml"; do
+  if [ -d "$f" ]; then
+    sudo rm -rf "$f"
+  fi
+done
+
+# ── Generate traefik.yml (static config) ───────────────────────────────────
+cat > "$CONFIG_DIR/traefik.yml" <<'YAMLSTATIC'
+entryPoints:
+  web:
+    address: ":80"
+    http:
+      redirections:
+        entryPoint:
+          to: websecure
+          scheme: https
+  websecure:
+    address: ":443"
+
+providers:
+  file:
+    filename: /etc/traefik/dynamic.yml
+    watch: true
+YAMLSTATIC
 
 # ── Generate dynamic.yml ─────────────────────────────────────────────────────
 {