fix(services): conditional caddy_net for filebrowser, homebox, watchtower

Only include the caddy_net network block in docker-compose.yml when
~/docker/caddy exists, preventing "network not found" errors on
standalone installs without Caddy.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01D8ckUJQtj1pH8jtAddBDZs

services/filebrowser.sh

@@ -199,6 +199,23 @@ install_filebrowser() {
     local FB_PATH=""
     prompt_text "Primary files directory to browse [default: $ACTUAL_HOME]:" "$ACTUAL_HOME" FB_PATH
 
+    local _CADDY_NET_BLOCK=""
+    if [ -d "$DOCKER_DIR/caddy" ]; then
+        _CADDY_NET_BLOCK="    networks:
+      - caddy_net
+"
+    fi
+
+    local _CADDY_NET_SECTION=""
+    if [ -d "$DOCKER_DIR/caddy" ]; then
+        _CADDY_NET_SECTION="
+networks:
+  caddy_net:
+    external: true
+    name: ${SITE_CADDY_NET:-caddy_net}
+"
+    fi
+
     cat > docker-compose.yml << FB_COMPOSE
 name: filebrowser
 
@@ -215,13 +232,7 @@ services:
       - ${FB_PATH}:/files
     ports:
       - "8085:80"
-    networks:
+${_CADDY_NET_BLOCK}${_CADDY_NET_SECTION}
-      - caddy_net
-
-networks:
-  caddy_net:
-    external: true
-    name: \${CADDY_NET:-caddy_net}
 FB_COMPOSE
 
     cat > .env << FB_ENV

services/homebox.sh

@@ -197,6 +197,23 @@ install_homebox() {
     ensure_docker_dir_ownership "$HB_DIR"
     cd "$HB_DIR" || return 1
 
+    local _CADDY_NET_BLOCK=""
+    if [ -d "$DOCKER_DIR/caddy" ]; then
+        _CADDY_NET_BLOCK="    networks:
+      - caddy_net
+"
+    fi
+
+    local _CADDY_NET_SECTION=""
+    if [ -d "$DOCKER_DIR/caddy" ]; then
+        _CADDY_NET_SECTION="
+networks:
+  caddy_net:
+    external: true
+    name: ${SITE_CADDY_NET:-caddy_net}
+"
+    fi
+
     cat > docker-compose.yml << HB_COMPOSE
 name: homebox
 
@@ -213,13 +230,7 @@ services:
       - ./data:/data
     ports:
       - "7745:7745"
-    networks:
+${_CADDY_NET_BLOCK}${_CADDY_NET_SECTION}
-      - caddy_net
-
-networks:
-  caddy_net:
-    external: true
-    name: \${CADDY_NET:-caddy_net}
 HB_COMPOSE
 
     cat > .env << HB_ENV

services/watchtower.sh

@@ -128,6 +128,23 @@ install_watchtower() {
         NTFY_URL="http://ntfy/watchtower"
     fi
 
+    local _CADDY_NET_BLOCK=""
+    if [ -d "$DOCKER_DIR/caddy" ]; then
+        _CADDY_NET_BLOCK="    networks:
+      - caddy_net
+"
+    fi
+
+    local _CADDY_NET_SECTION=""
+    if [ -d "$DOCKER_DIR/caddy" ]; then
+        _CADDY_NET_SECTION="
+networks:
+  caddy_net:
+    external: true
+    name: ${SITE_CADDY_NET:-caddy_net}
+"
+    fi
+
     cat > docker-compose.yml << WT_COMPOSE
 name: watchtower
 
@@ -152,13 +169,7 @@ services:
       - WATCHTOWER_DEBUG=false
     volumes:
       - /var/run/docker.sock:/var/run/docker.sock:ro
-    networks:
+${_CADDY_NET_BLOCK}${_CADDY_NET_SECTION}
-      - caddy_net
-
-networks:
-  caddy_net:
-    external: true
-    name: \${CADDY_NET:-caddy_net}
 WT_COMPOSE
 
     # Create .env