chore(test): Scaffold Docker environment for E2E testing

docker-compose.test.yml

@@ -0,0 +1,22 @@
+services:
+  silverbullet-test:
+    image: zefhemel/silverbullet:latest
+    ports:
+      - "3001:3000"
+    volumes:
+      - sb-test-space:/space
+    environment:
+      - SB_USER=admin:admin
+      - SB_LOG_PUSH=true
+      - SB_DEBUG=true
+      - SB_SPACE_LUA_TRUSTED=true
+
+  mock-ics-server:
+    image: nginx:alpine
+    ports:
+      - "8081:80"
+    volumes:
+      - ./test_data:/usr/share/nginx/html:ro
+
+volumes:
+  sb-test-space: