fix: adds git to docker image (#162)

Dockerfile

@@ -4,6 +4,9 @@ ADD src ./src
 ADD pyproject.toml .
 ADD setup.py .
 
+# Add git in case we need to install from branches
+RUN apt-get update && apt-get install -y git
+
 # Pip command. Without '-e' flag, index.html isn't found. There's probably a
 # better way to add the static html files to the site-packages.
 RUN pip install -e .[server] --no-cache-dir