add custom domain support

.env

@@ -0,0 +1 @@
+#PUBLIC_URL = "https://your.domain"

.github/workflows/deploy.yml

@@ -28,7 +28,11 @@ jobs:
 
       - name: Build project
         run: |
-          PUBLIC_URL="https://$(echo $GITHUB_REPOSITORY | awk -F / '{print tolower($1)}').github.io/$(echo $GITHUB_REPOSITORY | awk -F / '{print tolower($2)}')" npm run build
+          if ! grep -q "PUBLIC_URL" .env; then
+            PUBLIC_URL="https://$(echo $GITHUB_REPOSITORY | awk -F / '{print tolower($1)}').github.io/$(echo $GITHUB_REPOSITORY | awk -F / '{print tolower($2)}')"
+            echo "PUBLIC_URL=$PUBLIC_URL" >> $GITHUB_ENV
+          fi
+          npm run build
         env:
           GITHUB_REPOSITORY: ${{ github.repository }}
           CI: false

README.md

@@ -111,7 +111,7 @@ Feel free to fork this project and make it your own. Here's how to deploy your v
 5. Deploy to your preferred service, like GitHub Pages (Works out of the box, just enable Actions and give them the correct permissions: Actions -> General -> Workflow -> Read and write permissions ).
 6. Enable GH Pages -> Pages -> "Deploy from a branch" -> "gh-pages"
 Happy sharing of your professional digital business card!
-
+7. Pls also check, if you use a custom domain, that this is in the .env File as PUBLIC_URL
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