refactor: replace IS_GITHUB environment variable with inline server URL checks

.github/workflows/ci.yml

@@ -11,8 +11,6 @@ env:
   DB_NAME: piku_test_db
   DB_USER: test
   DB_PASSWORD: password123
-  # WHY?: different configuration for gitea and github becasue of GHES no support check
-  IS_GITHUB: ${{ github.server_url == 'https://github.com' }}
 
 jobs:
   setup-environment:
@@ -27,8 +25,9 @@ jobs:
           mkcert -install
           mkcert -cert-file certs/localhost.pem -key-file certs/localhost-key.pem localhost 127.0.0.1 ::1
 
+      # WHY?: different configuration for gitea and github becasue of GHES no support check
       - name: Upload certificates (GitHub)
-        if: env.IS_GITHUB == 'true'
+        if: ${{ github.server_url == 'https://github.com' }}
         uses: actions/upload-artifact@v4
         with:
           name: ssl-certs
@@ -36,7 +35,7 @@ jobs:
           retention-days: 1
 
       - name: Upload certificates (Gitea)
-        if: env.IS_GITHUB != 'true'
+        if: ${{ github.server_url != 'https://github.com' }}
         uses: christopherHX/gitea-upload-artifact@v4
         with:
           name: ssl-certs
@@ -55,14 +54,14 @@ jobs:
       - uses: oven-sh/setup-bun@v2
 
       - name: Download certificates (GitHub)
-        if: env.IS_GITHUB == 'true'
+        if: ${{ github.server_url == 'https://github.com' }}
         uses: actions/download-artifact@v4
         with:
           name: ssl-certs
           path: certs/
 
       - name: Download certificates (Gitea)
-        if: env.IS_GITHUB != 'true'
+        if: ${{ github.server_url != 'https://github.com' }}
         uses: christopherHX/gitea-download-artifact@v4
         with:
           name: ssl-certs
@@ -108,14 +107,14 @@ jobs:
           cache-dependency-glob: "backend/uv.lock"
 
       - name: Download certificates (GitHub)
-        if: env.IS_GITHUB == 'true'
+        if: ${{ github.server_url == 'https://github.com' }}
         uses: actions/download-artifact@v4
         with:
           name: ssl-certs
           path: certs/
 
       - name: Download certificates (Gitea)
-        if: env.IS_GITHUB != 'true'
+        if: ${{ github.server_url != 'https://github.com' }}
         uses: christopherHX/gitea-download-artifact@v4
         with:
           name: ssl-certs
@@ -128,10 +127,11 @@ jobs:
           # Use internal networking for Gitea
           if [ "$GITEA_ACTIONS" = "true" ]; then
             export DB_HOST="postgres"
+            export DB_PORT="5432"
           else
             export DB_HOST="127.0.0.1"
+            export DB_PORT="5442"
           fi
-          export DB_PORT="5442"
           uv run ruff check
           uv run python manage.py test
 
@@ -144,14 +144,14 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Download Certificates (GitHub)
-        if: env.IS_GITHUB == 'true'
+        if: ${{ github.server_url == 'https://github.com' }}
         uses: actions/download-artifact@v4
         with:
           name: ssl-certs
           path: certs/
 
       - name: Download Certificates (Gitea)
-        if: env.IS_GITHUB != 'true'
+        if: ${{ github.server_url != 'https://github.com' }}
         uses: christopherHX/gitea-download-artifact@v4
         with:
           name: ssl-certs
@@ -163,7 +163,7 @@ jobs:
 
       - name: Cache Playwright
         id: playwright-cache
-        if: env.IS_GITHUB == 'true'
+        if: ${{ github.server_url == 'https://github.com' }}
         uses: actions/cache@v4
         with:
           path: ~/.cache/ms-playwright
@@ -185,7 +185,7 @@ jobs:
           CI: "true"
 
       - name: Upload Playwright Report (GitHub)
-        if: always() && env.IS_GITHUB == 'true'
+        if: always() && ${{ github.server_url == 'https://github.com' }}
         uses: actions/upload-artifact@v4
         with:
           name: playwright-report
@@ -193,7 +193,7 @@ jobs:
           retention-days: 10
 
       - name: Upload Playwright Report (Gitea)
-        if: always() && env.IS_GITHUB != 'true'
+        if: always() && ${{ github.server_url != 'https://github.com' }}
         uses: christopherHX/gitea-upload-artifact@v4
         with:
           name: playwright-report