diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 68ed4f9..716964e 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -10,6 +10,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
     - name: Build images
       run: make docker
 
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..7254627
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+gateway-sim-key*
diff --git a/Makefile b/Makefile
index 0fca764..f0ee407 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-.PHONY: docker link setup gateway
+.PHONY: docker link setup gateway ci
 
 docker:
 	docker build -t fractalnetworks/selfhosted-gateway:latest ./src/gateway/
@@ -17,3 +17,7 @@ link:
 
 link-macos:
 	docker run -v /run/host-services/ssh-auth.sock:/run/host-services/ssh-auth.sock -e SSH_AUTH_SOCK="/run/host-services/ssh-auth.sock" --rm -it fractalnetworks/gateway-cli:latest $(GATEWAY) $(FQDN) $(EXPOSE}
+
+ci:
+	ssh-keygen -t ed25519 -f ./ci/gateway-sim-key -N ""
+	docker build -t fractalnetworks/gateway-sim -f ./ci/Dockerfile ./ci
diff --git a/ci/Dockerfile b/ci/Dockerfile
new file mode 100644
index 0000000..9c7fb71
--- /dev/null
+++ b/ci/Dockerfile
@@ -0,0 +1,8 @@
+FROM alpine:latest
+RUN apk add openssh-server
+RUN ssh-keygen -A
+
+COPY gateway-sim-key.pub /root/.ssh/authorized_keys
+
+ENTRYPOINT [ "/usr/sbin/sshd", "-D", "-e" ]
+