ci: curl against ipv6, ipv6 port mapping, explicit PORT arg

Author: Xevion

.github/workflows/image.yaml

@@ -36,11 +36,11 @@ jobs:
           set -euxo pipefail
 
           # Test server startup
-          docker run -d --name test-server -p 8000:8000 glim-test
+          docker run -d --name test-server -p [::]:8000:8000 -e PORT=8000 glim-test
 
           # Wait for server to start with retry logic
           for i in {1..30}; do
-            if curl -f -s http://localhost:8000/health > /dev/null 2>&1; then
+            if curl -f -s http://[::1]:8000/health > /dev/null 2>&1; then
               echo "Server is ready after $i seconds"
               if [ $i -gt 8 ]; then
                 echo "::warning::Server took longer than expected to start ($i seconds)"
@@ -59,19 +59,19 @@ jobs:
           done
 
           # Test health endpoint
-          if ! curl -f http://localhost:8000/health; then
+          if ! curl -f http://[::1]:8000/health; then
             echo "::error::Health endpoint test failed"
             exit 1
           fi
 
           # Test main endpoint (should redirect)
-          if ! curl -f -I http://localhost:8000/; then
+          if ! curl -f -I http://[::1]:8000/; then
             echo "::error::Main endpoint test failed"
             exit 1
           fi
 
           # Test image generation
-          if ! curl -f -o test-image.png -w "%{http_code}" http://localhost:8000/Xevion/Glim.png | grep -q "200"; then
+          if ! curl -f -o test-image.png -w "%{http_code}" http://[::1]:8000/Xevion/Glim.png | grep -q "200"; then
             echo "::error::Image generation test failed"
             exit 1
           fi