diff --git a/.github/workflows/build-docker.yml b/.github/workflows/build-docker.yml
new file mode 100644
index 0000000..4835f34
--- /dev/null
+++ b/.github/workflows/build-docker.yml
@@ -0,0 +1,28 @@
+name: Build Docker Image
+
+on:
+  workflow_dispatch:
+
+env:
+  REGISTRY: ghcr.io
+  NAME: ppf-contact-solver-base
+jobs:
+  build-and-push:
+    runs-on: ppf-contact-solver-NVIDIA
+    permissions:
+      contents: read
+      packages: write
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+    - name: Docker Login
+      uses: docker/login-action@v3
+      with:
+        registry: ${{ env.REGISTRY }}
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+    - name: Build Image
+      uses: docker/build-push-action@v5
+      with:
+        push: true
+        tags: ${{ env.REGISTRY }}/${{ github.repository }}/${{ env.NAME }}:latest
\ No newline at end of file
diff --git a/examples/needle.ipynb b/examples/needle.ipynb
index 885e71c..1b812b2 100644
--- a/examples/needle.ipynb
+++ b/examples/needle.ipynb
@@ -16,7 +16,7 @@
     "V, F = app.mesh.square(res=129)\n",
     "app.asset.add.tri(\"sheet\", V, F)\n",
     "\n",
-    "V, F = app.mesh.cone(height=5, Nr=20, Ny=32, Nb=12, radius=1)\n",
+    "V, F = app.mesh.cone(height=5, Nr=40, Ny=64, Nb=12, radius=1, sharpen=2)\n",
     "app.asset.add.tri(\"cone\", V, F)\n",
     "\n",
     "V, F, T = app.mesh.icosphere(r=0.25, subdiv_count=4).tetrahedralize()\n",