diff --git a/.devcontainer/asset_list/devcontainer.json b/.devcontainer/asset_list/devcontainer.json
index 7c597859..945dcd88 100644
--- a/.devcontainer/asset_list/devcontainer.json
+++ b/.devcontainer/asset_list/devcontainer.json
@@ -23,7 +23,8 @@
         "corentinartaud.pdfpreview",
         "ms-python.vscode-python-envs",
         "ms-python.black-formatter",
-        "GrapeCity.gc-excelviewer"
+        "GrapeCity.gc-excelviewer",
+        "jakobhoeg.vscode-pokemon"
       ],
       "settings": {
         "files.defaultWorkspace": "/workspaces/model",
diff --git a/.devcontainer/backend/devcontainer.json b/.devcontainer/backend/devcontainer.json
index 377adf1e..5d728dcd 100644
--- a/.devcontainer/backend/devcontainer.json
+++ b/.devcontainer/backend/devcontainer.json
@@ -23,7 +23,8 @@
         "ms-python.vscode-python-envs",
         "ms-python.black-formatter",
         "waderyan.gitblame",
-        "GrapeCity.gc-excelviewer"
+        "GrapeCity.gc-excelviewer",
+        "jakobhoeg.vscode-pokemon"
       ],
       "settings": {
         "files.defaultWorkspace": "/workspaces/model",
diff --git a/backend/postcode_splitter/handler/Dockerfile b/backend/postcode_splitter/handler/Dockerfile
index 7c1a7989..4c002f1d 100644
--- a/backend/postcode_splitter/handler/Dockerfile
+++ b/backend/postcode_splitter/handler/Dockerfile
@@ -3,6 +3,12 @@ FROM public.ecr.aws/lambda/python:3.10
 # Set working directory (Lambda task root)
 WORKDIR /var/task
 
+COPY backend/postcode_splitter/handler/requirements.txt
+
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY utils/ utils/
+COPY backend/postcode_splitter/main.py .
 # -----------------------------
 # Lambda handler
 # -----------------------------