diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 9905a9d..a98e7f9 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -148,46 +148,8 @@ jobs:
           report_individual_runs: true
 
 
-
-  # Test if project still runs on every os
-  test_build:
-    needs: [test, lint]
-    runs-on: ${{ matrix.os }}
-    name: Build Python ${{ matrix.py }} @ ${{ matrix.os }}
-    strategy:
-      fail-fast: true
-      matrix:
-        os: ["ubuntu-latest", "windows-latest", "macos-latest"]
-        py: ["3.9", "3.10"]
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v3
-
-      - name: Setup Python
-        uses: actions/setup-python@v4
-        with:
-          python-version: '3.10'
-          architecture: 'x64'
-
-      - name: Cache pip
-        uses: actions/cache@v3
-        with:
-          path: ~/.cache/pip
-          key: ${{matrix.os}}-${{ matrix.py }}-${{ hashFiles('pyproject.toml') }}-${{ hashFiles('requirements**.txt') }}
-
-      - name: Install requirements
-        run: |
-          pip install --upgrade --upgrade-strategy eager -r requirements-dev.txt -e .
-
-
-      - name: Run tests
-        run: |
-          pytest ./tests
-
-
-
   build_dev_image:
-    needs: [ test, lint, test_build ]
+    needs: [ test, lint ]
     runs-on: ubuntu-latest
     name: "Build dev image"
     if: ${{ success() && github.actor != 'dependabot[bot]' }}
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
new file mode 100644
index 0000000..1a6fb3e
--- /dev/null
+++ b/.gitlab-ci.yml
@@ -0,0 +1,35 @@
+default:
+  tags:
+    - nowum
+
+stages:
+- deploy-dev
+- deploy-release
+
+deploy-dev:
+  image: alpine:latest
+  stage: deploy-dev
+  script:
+    - chmod og= $SSH_ED25519
+    - apk update && apk add openssh-client
+    - ssh -p 8080 -i $SSH_ED25519 -o StrictHostKeyChecking=no $SERVER_USER@$SERVER_IP "cd EnSysMod && docker-compose pull ensysmod-dev && docker-compose down ensysmod-dev && docker-compose up ensysmod-dev -d && docker system prune -f"
+  only:
+    - main
+  environment:
+    url: https://$SERVER_IP
+    name: development
+
+deploy-release:
+  image: alpine:latest
+  stage: deploy-release
+  script:
+    - chmod og= $SSH_ED25519
+    - apk update && apk add openssh-client
+    - ssh -p 9000 -i $SSH_ED25519 -o StrictHostKeyChecking=no $SERVER_USER@$SERVER_IP "cd EnSysMod && docker-compose pull && docker-compose down && docker-compose up -d && docker system prune -f"
+  only:
+    - tags
+  except:
+    - branches
+  environment:
+    url: https://$SERVER_IP
+    name: release
diff --git a/compose.yaml b/compose.yaml
new file mode 100644
index 0000000..e0cf702
--- /dev/null
+++ b/compose.yaml
@@ -0,0 +1,10 @@
+services:
+  ensysmod-dev:
+    image: "ghcr.io/nowum/ensysmod:main"
+    ports:
+      - 8080:8080
+
+  ensysmod-release:
+    image: "ghcr.io/nowum/ensysmod:latest"
+    ports:
+      - 9000:8080
diff --git a/pyproject.toml b/pyproject.toml
index 627acfe..94643dc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -67,6 +67,7 @@ addopts = [
 ]
 markers = [
     "slow: marks tests as slow (deselect with '-m \"not slow\"')",
+    "require_solver: marks tests that require solver to be installed (deselect with '-m \"not require_solver\"')",
 ]
 
 [tool.coverage.report]
diff --git a/tests/api/test_energy_model_optimization.py b/tests/api/test_energy_model_optimization.py
index 3be3509..727326c 100644
--- a/tests/api/test_energy_model_optimization.py
+++ b/tests/api/test_energy_model_optimization.py
@@ -9,6 +9,7 @@
 
 
 @pytest.mark.slow
+@pytest.mark.require_solver
 @pytest.mark.parametrize("data_folder", ["1node_Example", "Multi-regional_Example"])
 def test_optimize_model(client: TestClient, normal_user_headers: Dict[str, str], db: Session, data_folder: str):
     """