application startup fixes

Dockerfile

@@ -5,15 +5,22 @@
 ###############################################################################
 
 FROM python:3.10-bullseye as fab-dev
-
+ARG USE_DEV_REQUIREMENTS
 
 WORKDIR /app
 
-COPY . .
-RUN apt-get update && apt-get install -y postgresql-client
+COPY requirements.txt requirements.txt
+COPY requirements-dev.txt requirements-dev.txt
 
-RUN python3 -m pip install --upgrade pip && pip install pip-tools && pip install -r requirements.txt
-RUN python3 -m pip install -r requirements-dev.txt
+RUN if "$USE_DEV_REQUIREMENTS"; then \
+    echo "Installing development dependencies..." && \
+    python3 -m pip install --upgrade pip && pip install -r requirements-dev.txt; \
+else \
+    echo "Installing production dependencies..." && \
+    python3 -m pip install --upgrade pip && pip install -r requirements.txt; \
+fi
+
+COPY . .
 
 EXPOSE 8080
 

app.py

@@ -0,0 +1 @@
+import app  # noqa

app/__init__.py

@@ -0,0 +1 @@
+from app.create_app import app  # noqa

app/app.py → app/create_app.py

@@ -59,4 +59,4 @@ def create_app() -> Flask:
     return flask_app
 
 
-app = create_app()
+app = create_app()