diff --git a/.Dockerignore b/.Dockerignore
index e69de29..c0fea91 100644
--- a/.Dockerignore
+++ b/.Dockerignore
@@ -0,0 +1,6 @@
+.env
+action.yml
+dev-requirements.txt
+LICENSE
+mypy.ini
+.github
\ No newline at end of file
diff --git a/Dockerfile b/Dockerfile
index 4e3bbdc..2e854b3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,19 +1,6 @@
-FROM python:3-slim AS builder
-
+FROM python:3.10.14-slim-bullseye
 WORKDIR /app
-
-# Just dependencies to minimise rebuilds
 COPY requirements.txt .
-
-# We are installing a dependency here directly into our app source dir
-RUN pip install --target=/app -r requirements.txt
-
+RUN pip install -r requirements.txt
 ADD . /app
-
-# A distroless container image with Python and some basics like SSL certificates
-# https://github.com/GoogleContainerTools/distroless
-FROM gcr.io/distroless/python3-debian10
-COPY --from=builder /app /app
-WORKDIR /app
-ENV PYTHONPATH /app
-CMD ["/app/main.py"]
+CMD ["python", "/app/main.py"]
diff --git a/main.py b/main.py
index 1497b02..05c4a8c 100644
--- a/main.py
+++ b/main.py
@@ -221,7 +221,7 @@ async def update_details_of_item(
 
     # Get correct domain info update model
     domain_info_model = SUBTYPE_TO_DOMAIN_INFO.get(subtype)
-    assert domain_info_model, f"Unexpected missing domain info model for {subtype = }."
+    assert domain_info_model, f"Unexpected missing domain info model for {subtype}."
     update_payload = domain_info_model.parse_obj(merged_metadata)
     print(update_payload.dict())