✨(widgets) import widgets code from Messages and setup Docker workflow (#33)

This adds Gaufre v2 with source, documentation, examples and built artefacts.
Also includes the feedback widget from Messages.

compose.yaml

@@ -0,0 +1,34 @@
+name: integration
+
+services:
+
+  website-dev:
+    user: "${DOCKER_USER:-1000}"
+    build:
+      context: ./website
+      dockerfile: Dockerfile
+    env_file:
+      - ops/env/website.defaults
+      - ops/env/website.local
+    command: ["npm", "run", "dev"]
+    volumes:
+      - ./website/:/home/website/
+    ports:
+      - "8930:8930"
+
+  widgets-dev:
+    user: "${DOCKER_USER:-1000}"
+    build:
+      context: ./packages/widgets
+      dockerfile: Dockerfile
+    env_file:
+      - ops/env/widgets.defaults
+      - ops/env/widgets.local
+    command: ["npm", "run", "dev"]
+    volumes:
+      - ./packages/widgets/:/home/widgets/
+      - ./website/:/home/website/
+      - ./website/src/pages/widgets-demo/:/home/widgets/widgets-demo/
+      - ./website/public/widgets/:/home/widgets/widgets/
+    ports:
+      - "8931:8931"