Revert "use prebuilt image for docs"

This reverts commit ef4282b348.

.woodpecker.yml

@@ -172,8 +172,12 @@ pipeline:
     - SCW_DEFAULT_ORGANIZATION_ID
     environment:
       CI: "true"
-    image: akkoma/docs-builder
+    image: python:3.10-slim
     commands:
+      - apt-get update && apt-get install -y rclone wget git zip
+      - wget https://github.com/scaleway/scaleway-cli/releases/download/v2.5.1/scaleway-cli_2.5.1_linux_amd64
+      - mv scaleway-cli_2.5.1_linux_amd64 scaleway-cli
+      - chmod +x scaleway-cli
       - ./scaleway-cli object config install type=rclone
       - cd docs
       - pip install -r requirements.txt