Fix mkdocs workflow to use the same directory

.github/workflows/mkdocs-deployment.yml

@@ -16,3 +16,4 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           CONFIG_FILE: docs/mkdocs.yml
+          REQUIREMENTS: docs/requirements.txt

docs/mkdocs.yml

@@ -3,6 +3,7 @@ site_name: 'doccano'
 site_description: 'A Text Annotation tool for Humans'
 site_author: 'Hiroki Nakayama'
 site_url: 'https://doccano.github.io/doccano/'
+docs_dir: .
 
 # Repository
 repo_name: 'doccano/doccano'
@@ -25,6 +26,9 @@ extra:
     - icon: 'fontawesome/brands/github'
       link: 'https://twitter.com/Hironsan13'
 
+plugins:
+  - same-dir
+
 # Page tree
 nav:
   - Doccano: index.md

docs/requirements.txt

@@ -0,0 +1 @@
+mkdocs-same-dir