fix: configurable OLLAMA_URL for Docker container

Ollama runs on host, container needs host.docker.internal mapping.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

src/app/api/contributions/route.ts

@@ -65,7 +65,8 @@ JSON:`
     const controller = new AbortController()
     setTimeout(() => controller.abort(), 15000)
     
-    const res = await fetch('http://localhost:11434/api/generate', {
+    const ollamaUrl = process.env.OLLAMA_URL || 'http://localhost:11434'
+    const res = await fetch(`${ollamaUrl}/api/generate`, {
       method: 'POST',
       headers: { 'Content-Type': 'application/json' },
       signal: controller.signal,

src/app/api/moderate/route.ts

@@ -15,7 +15,8 @@ export async function POST(req: NextRequest) {
     }
 
     // Ollama API aufrufen
-    const ollamaResponse = await fetch('http://localhost:11434/api/generate', {
+    const ollamaUrl = process.env.OLLAMA_URL || 'http://localhost:11434'
+    const ollamaResponse = await fetch(`${ollamaUrl}/api/generate`, {
       method: 'POST',
       headers: { 'Content-Type': 'application/json' },
       body: JSON.stringify({