diff --git a/docs/INFRA.md b/docs/INFRA.md
index 7ff0239..faf251a 100644
--- a/docs/INFRA.md
+++ b/docs/INFRA.md
@@ -71,6 +71,7 @@ Correct public path for hub:
 |-----|-----------|
 | `https://apps.f0xx.org/app/androidcast_project/` | Static hub (`examples/app_hub/index.html`) |
 | `https://apps.f0xx.org/app/androidcast_project/crashes/` | PHP crash + tickets console |
+| `https://apps.f0xx.org/app/androidcast_project/build/` | PHP APK builder console |
 | `https://apps.f0xx.org/app/androidcast_project/crashes/api/upload.php` | Device crash upload (no session) |
 
 Legacy hostname **`f0xx.org`** may still appear in app `settings.json` examples; production ingest/scripts prefer **`apps.f0xx.org`**.
@@ -99,7 +100,9 @@ Web root prefix:
 
 | File | Purpose |
 |------|---------|
-| **`examples/crash_reporter/backend/nginx.apps-port80.fragment`** | **Replace** BE `server { listen 80; ... }` — hub + crashes + assets |
+| **`examples/crash_reporter/backend/nginx.apps-port80.fragment`** | **Replace** BE `server { listen 80; ... }` — hub + crashes + build |
+| `examples/crash_reporter/backend/nginx.apps-builder.frag` | Build-only blocks (also included on BE 443 via `apps_builder.frag`) |
+| `examples/crash_reporter/backend/nginx.fe-apps.f0xx.org.snippet` | FE hub/crashes → `http://artc0:80` (preserve URI) |
 | `examples/crash_reporter/backend/nginx.apps.conf.fragment` | Reference blocks (443-oriented comments) |
 | `examples/crash_reporter/backend/nginx.vm.conf` | Full VM example |
 
diff --git a/examples/app_hub/DEPLOY.md b/examples/app_hub/DEPLOY.md
index fcee911..fcbef9f 100644
--- a/examples/app_hub/DEPLOY.md
+++ b/examples/app_hub/DEPLOY.md
@@ -40,9 +40,19 @@ Replace the whole **`server { listen 80; ... }`** block with:
 
 **`examples/crash_reporter/backend/nginx.apps-port80.fragment`**
 
-That file has hub + crashes + assets on **port 80**.
+That file has hub + crashes + build on **port 80**.
 
-The **`listen 443 ssl`** block can stay for direct HTTPS to the VM if you use it internally; public traffic from FE never needs it for this app.
+Or run (from repo, with write access to the mount):
+
+```bash
+sudo ./examples/crash_reporter/backend/scripts/apply-be-port80-nginx.sh
+```
+
+**FE** (`tmp/FE_gentoo/etc/nginx/nginx.conf`): hub and crashes must use
+`proxy_pass http://artc0.intra.raptor.org:80;` **without** a trailing slash or path suffix.
+See **`nginx.fe-apps.f0xx.org.snippet`**.
+
+The **`listen 443 ssl`** block can stay for direct HTTPS to the VM if you use it internally; public traffic from FE should prefer **:80** for one consistent vhost.
 
 Use prefix location for the hub (not `alias` to a single file):
 
diff --git a/examples/build_console/backend/src/bootstrap.php b/examples/build_console/backend/src/bootstrap.php
index 676269f..73fa5aa 100644
--- a/examples/build_console/backend/src/bootstrap.php
+++ b/examples/build_console/backend/src/bootstrap.php
@@ -1,9 +1,10 @@
 <?php
 declare(strict_types=1);
 
-require_once dirname(__DIR__, 2) . '/platform/shared_session.php';
+$examplesRoot = dirname(__DIR__, 3);
+require_once $examplesRoot . '/platform/shared_session.php';
 
-$crashSrc = dirname(__DIR__, 2) . '/crash_reporter/backend/src';
+$crashSrc = $examplesRoot . '/crash_reporter/backend/src';
 $configPath = __DIR__ . '/../config/config.php';
 if (!is_file($configPath)) {
     $configPath = __DIR__ . '/../config/config.example.php';
diff --git a/examples/crash_reporter/backend/nginx.apps-builder.frag b/examples/crash_reporter/backend/nginx.apps-builder.frag
new file mode 100644
index 0000000..0a6b532
--- /dev/null
+++ b/examples/crash_reporter/backend/nginx.apps-builder.frag
@@ -0,0 +1,17 @@
+location = /app/androidcast_project/build {
+	return 301 /app/androidcast_project/build/;
+}
+
+location ^~ /app/androidcast_project/build/assets/ {
+	alias /var/www/localhost/htdocs/apps/app/androidcast_project/android_cast/examples/build_console/backend/public/assets/;
+}
+
+location ^~ /app/androidcast_project/build/ {
+	include fastcgi_params;
+	fastcgi_pass unix:/run/php-fpm.socket;
+	fastcgi_param SCRIPT_FILENAME /var/www/localhost/htdocs/apps/app/androidcast_project/android_cast/examples/build_console/backend/public/index.php;
+	fastcgi_param SCRIPT_NAME /app/androidcast_project/build/index.php;
+	fastcgi_param REQUEST_URI $request_uri;
+	client_max_body_size 512m;
+	fastcgi_read_timeout 1800s;
+}
diff --git a/examples/crash_reporter/backend/nginx.apps-port80.fragment b/examples/crash_reporter/backend/nginx.apps-port80.fragment
index 9b6f508..3978704 100644
--- a/examples/crash_reporter/backend/nginx.apps-port80.fragment
+++ b/examples/crash_reporter/backend/nginx.apps-port80.fragment
@@ -40,6 +40,24 @@ server {
 		client_max_body_size 4m;
 	}
 
+	location = /app/androidcast_project/build {
+		return 301 /app/androidcast_project/build/;
+	}
+
+	location ^~ /app/androidcast_project/build/assets/ {
+		alias /var/www/localhost/htdocs/apps/app/androidcast_project/android_cast/examples/build_console/backend/public/assets/;
+	}
+
+	location ^~ /app/androidcast_project/build/ {
+		include fastcgi_params;
+		fastcgi_pass unix:/run/php-fpm.socket;
+		fastcgi_param SCRIPT_FILENAME /var/www/localhost/htdocs/apps/app/androidcast_project/android_cast/examples/build_console/backend/public/index.php;
+		fastcgi_param SCRIPT_NAME /app/androidcast_project/build/index.php;
+		fastcgi_param REQUEST_URI $request_uri;
+		client_max_body_size 512m;
+		fastcgi_read_timeout 1800s;
+	}
+
 	location ~ \.php$ {
 		include /etc/nginx/fastcgi.conf;
 		fastcgi_pass unix:/run/php-fpm.socket;
diff --git a/examples/crash_reporter/backend/nginx.fe-apps.f0xx.org.snippet b/examples/crash_reporter/backend/nginx.fe-apps.f0xx.org.snippet
new file mode 100644
index 0000000..4103fa7
--- /dev/null
+++ b/examples/crash_reporter/backend/nginx.fe-apps.f0xx.org.snippet
@@ -0,0 +1,23 @@
+# FE apps.f0xx.org — replace hub/crashes upstream blocks (use BE port 80, preserve URI).
+# File: tmp/FE_gentoo/etc/nginx/nginx.conf  (inside server { listen 443; server_name apps.f0xx.org; })
+
+		location /app/androidcast_project/ {
+		 	proxy_pass http://artc0.intra.raptor.org:80;
+		 	proxy_http_version 1.1;
+		 	proxy_set_header Host              $host;
+		 	proxy_set_header X-Real-IP         $remote_addr;
+		 	proxy_set_header X-Forwarded-For   $proxy_add_x_forwarded_for;
+		 	proxy_set_header X-Forwarded-Proto $scheme;
+		}
+
+		location /app/androidcast_project/crashes/ {
+		 	proxy_pass http://artc0.intra.raptor.org:80;
+		 	proxy_http_version 1.1;
+		 	proxy_set_header Host              $host;
+		 	proxy_set_header X-Real-IP         $remote_addr;
+		 	proxy_set_header X-Forwarded-For   $proxy_add_x_forwarded_for;
+		 	proxy_set_header X-Forwarded-Proto $scheme;
+		}
+
+# apps.conf build block must stay:
+#   proxy_pass http://artc0.intra.raptor.org:80;   (no trailing slash)
diff --git a/examples/crash_reporter/backend/scripts/apply-be-port80-nginx.sh b/examples/crash_reporter/backend/scripts/apply-be-port80-nginx.sh
new file mode 100755
index 0000000..1879a2b
--- /dev/null
+++ b/examples/crash_reporter/backend/scripts/apply-be-port80-nginx.sh
@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+# Replace BE apps.conf listen-80 block from repo fragment (run on machine with BE mount write access).
+set -euo pipefail
+ROOT="$(cd "$(dirname "$0")/../../.." && pwd)"
+REPO_ROOT="$(cd "$ROOT/../.." && pwd)"
+FRAG="$ROOT/crash_reporter/backend/nginx.apps-port80.fragment"
+APPS_CONF="${1:-$REPO_ROOT/tmp/BE_alpine/etc/nginx/conf.d/apps.conf}"
+if [[ ! -f "$FRAG" || ! -f "$APPS_CONF" ]]; then
+  echo "Usage: $0 [path/to/apps.conf]" >&2
+  exit 1
+fi
+python3 - "$FRAG" "$APPS_CONF" << 'PY'
+import sys
+from pathlib import Path
+frag, apps_path = map(Path, sys.argv[1:3])
+text = apps_path.read_text()
+start = text.index("server {\n\tlisten 80;")
+end = text.index("\n}\n\n\nserver {\n\tlisten 443")
+apps_path.write_text(text[:start] + frag.read_text().strip() + text[end:])
+print(f"Updated listen 80 in {apps_path}")
+PY
diff --git a/examples/crash_reporter/backend/scripts/deploy-to-be-mount.sh b/examples/crash_reporter/backend/scripts/deploy-to-be-mount.sh
index 1888d3c..ac3939f 100755
--- a/examples/crash_reporter/backend/scripts/deploy-to-be-mount.sh
+++ b/examples/crash_reporter/backend/scripts/deploy-to-be-mount.sh
@@ -3,6 +3,8 @@
 # Usage: ./scripts/deploy-to-be-mount.sh [DEST]
 set -euo pipefail
 SRC="$(cd "$(dirname "$0")/.." && pwd)"
+REPO_EXAMPLES="$(cd "$SRC/../.." && pwd)"
+BE_ROOT="${BE_ROOT:-$(cd "$REPO_EXAMPLES/../../tmp/BE_alpine/var/www/localhost/htdocs/apps/app/androidcast_project/android_cast" 2>/dev/null && pwd || true)}"
 DEST="${1:-$(cd "$SRC/../../../tmp/BE_alpine/var/www/localhost/htdocs/apps/app/androidcast_project/android_cast/examples/crash_reporter/backend" 2>/dev/null && pwd || true)}"
 if [[ -z "$DEST" || ! -d "$DEST" ]]; then
   echo "DEST not found. Pass BE mount path as first argument." >&2
@@ -11,4 +13,9 @@ fi
 rsync -a --no-group --no-owner \
   --exclude 'data/' --exclude 'config/config.php' \
   "$SRC/" "$DEST/"
+if [[ -n "$BE_ROOT" && -d "$BE_ROOT" ]]; then
+  rsync -a --no-group --no-owner \
+    "$REPO_EXAMPLES/platform/" "$BE_ROOT/examples/platform/"
+  echo "Synced platform/ to $BE_ROOT/examples/platform/"
+fi
 echo "Synced to $DEST (config.php and data/ untouched)."
diff --git a/examples/crash_reporter/backend/src/bootstrap.php b/examples/crash_reporter/backend/src/bootstrap.php
index d3cf85c..1b068f2 100644
--- a/examples/crash_reporter/backend/src/bootstrap.php
+++ b/examples/crash_reporter/backend/src/bootstrap.php
@@ -12,7 +12,7 @@
  */
 declare(strict_types=1);
 
-require_once dirname(__DIR__, 2) . '/platform/shared_session.php';
+require_once dirname(__DIR__, 3) . '/platform/shared_session.php';
 
 if (!function_exists('session_start')) {
     http_response_code(500);