Add deployment Dockerfile.

Dockerfile

@@ -0,0 +1,16 @@
+FROM docker.io/debian:bullseye-slim
+
+RUN mkdir /project
+WORKDIR /project
+
+RUN apt update && \
+    apt install -y \
+        python3 \
+        python3-pip \
+        git \
+        openssh-client
+
+COPY . /project
+RUN pip3 install .
+
+ENTRYPOINT ["j7s_branch_trigger"]