Added stirling pdf to stack

roles/docker/templates/stirling-compose.yml.j2

@@ -0,0 +1,18 @@
+version: '3.3'
+services:
+  stirlingpdf:
+    image: frooodle/s-pdf:latest
+    volumes:
+      - ./trainingData:/usr/share/tessdata #Required for extra OCR languages
+      - ./extraConfigs:/configs
+#      - ./customFiles:/customFiles/
+#      - ./logs:/logs/
+    environment:
+      - DOCKER_ENABLE_SECURITY=false
+      - INSTALL_BOOK_AND_ADVANCED_HTML_OPS=false
+      - LANGS=en_GB
+
+networks:
+  default:
+    external: true
+    name: lava