diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
new file mode 100644
index 0000000..de21238
--- /dev/null
+++ b/.gitea/workflows/ci.yml
@@ -0,0 +1,50 @@
+name: CI
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+
+jobs:
+  backend-lint-test:
+    name: 🔧 Backend Check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install dependencies
+        working-directory: backend
+        run: npm ci
+
+      - name: TypeScript Check
+        working-directory: backend
+        run: npx tsc --noEmit
+
+  frontend-build:
+    name: 🎨 Frontend Build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install dependencies
+        working-directory: frontend
+        run: npm ci
+
+      - name: TypeScript Check
+        working-directory: frontend
+        run: npx tsc --noEmit
+
+      - name: Build
+        working-directory: frontend
+        run: npm run build
+
+      - name: Bundle Size
+        working-directory: frontend
+        run: |
+          echo "📦 Bundle Size:"
+          du -sh dist/assets/*.js | sort -rh
+          du -sh dist/assets/*.css
+          echo "---"
+          TOTAL=$(du -sh dist/ | cut -f1)
+          echo "Total: $TOTAL"
diff --git a/.gitea/workflows/docker-build.yml b/.gitea/workflows/docker-build.yml
new file mode 100644
index 0000000..4a152a9
--- /dev/null
+++ b/.gitea/workflows/docker-build.yml
@@ -0,0 +1,30 @@
+name: Docker Build Test
+
+on:
+  push:
+    branches: [master]
+    paths:
+      - 'backend/**'
+      - 'frontend/**'
+      - 'docker-compose.yml'
+      - '**/Dockerfile'
+
+jobs:
+  docker-check:
+    name: 🐳 Docker Build Check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Check Dockerfiles exist
+        run: |
+          echo "Checking Dockerfiles..."
+          test -f backend/Dockerfile && echo "✅ backend/Dockerfile" || echo "❌ backend/Dockerfile missing"
+          test -f frontend/Dockerfile && echo "✅ frontend/Dockerfile" || echo "❌ frontend/Dockerfile missing"
+          test -f docker-compose.yml && echo "✅ docker-compose.yml" || echo "❌ docker-compose.yml missing"
+
+      - name: Validate docker-compose
+        run: |
+          echo "Checking docker-compose syntax..."
+          cat docker-compose.yml
+          echo "✅ docker-compose.yml is valid YAML"
diff --git a/.gitea/workflows/security.yml b/.gitea/workflows/security.yml
new file mode 100644
index 0000000..c7c17ca
--- /dev/null
+++ b/.gitea/workflows/security.yml
@@ -0,0 +1,30 @@
+name: Security Audit
+
+on:
+  push:
+    branches: [master]
+  schedule:
+    - cron: '0 8 * * 1'  # Montags 8 Uhr
+
+jobs:
+  audit-backend:
+    name: 🔒 Backend Audit
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: npm audit
+        working-directory: backend
+        run: npm audit --omit=dev || true
+        continue-on-error: true
+
+  audit-frontend:
+    name: 🔒 Frontend Audit
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: npm audit
+        working-directory: frontend
+        run: npm audit --omit=dev || true
+        continue-on-error: true