Re-instate the stagger doc server

.github/workflows/docker-image.yml

@@ -21,6 +21,11 @@ jobs:
 
     - name: Install dict
       run: sudo apt-get update && sudo apt-get install wamerican
+
+    - name: Install swagger
+      run: |
+        sudo curl -o /usr/local/bin/swagger -L'#' https://github.com/go-swagger/go-swagger/releases/download/v0.23.0/swagger_linux_amd64
+        sudo chmod +x /usr/local/bin/swagger
       
     - name: Check out repo
       uses: actions/checkout@v2