diff --git a/docker-compose.yml b/docker-compose.yml
index f03e0cc..93596f7 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -17,6 +17,10 @@ services:
     environment:
       - WATCHFILES_FORCE_POLLING=true
 
-    # for development: runs with hot reload, reloads server when the config folder changes
-    command: ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "2626", "--reload", "--reload-dir", "/spil_conf"]
+    # for development:
+    # Runs demo config inside mapped ./spil_hamlet_conf folder (mapped to /spil_conf inside docker)
+    # Starts uvicorn with hot reload (reloads server when the config folder changes)
+    command: >
+      sh -c "python -c \"import spil;import hamlet_scripts.save_examples_to_mock_fs as mfs;mfs.run()\" &&
+             uvicorn main:app --host 0.0.0.0 --port 2626 --reload --reload-dir /spil_conf"
     # See https://www.uvicorn.org/settings/
\ No newline at end of file
diff --git a/spil_server/docker/Dockerfile b/spil_server/docker/Dockerfile
index 5cdca72..2e7d511 100644
--- a/spil_server/docker/Dockerfile
+++ b/spil_server/docker/Dockerfile
@@ -17,11 +17,6 @@ ENV PYTHONPATH="${PYTHONPATH}:/spil:/spil_conf"
 # spil_hamlet_conf contains the spil demo config
 COPY ./spil_hamlet_conf /spil/spil_hamlet_conf
 
-# Init test data
-# Only used for builtin demo. Can be removed for real usage.
-# PYTHONDONTWRITEBYTECODE avoids to have __pycache__ in the Image
-RUN export PYTHONDONTWRITEBYTECODE=1 && python -c "import spil;import hamlet_scripts.save_examples_to_mock_fs as mfs;mfs.run()"
-
 # App will contain the fastapi app
 # Starting app:main.py is already included in the base docker image (tiangolo/uvicorn-gunicorn-fastapi)
 COPY ./spil_server/fastapi/app /app
\ No newline at end of file