fix: Docker build failures for client and server containers

- Pin tailwindcss@3 in client Dockerfile (v4 removed standalone CLI)
- Replace gunicorn --factory with callable syntax app:create_app()
- Fix Alembic config path with -c flag and %(here)s script_location

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

client/Dockerfile

@@ -14,12 +14,12 @@ RUN pip install --no-cache-dir -r requirements.txt gunicorn
 
 COPY . .
 
-# Build Tailwind CSS
+# Install and build Tailwind CSS
-RUN npx tailwindcss -i static/css/input.css -o static/css/tailwind.css --minify
+RUN npm install tailwindcss@3 && npx tailwindcss -i static/css/input.css -o static/css/tailwind.css --minify
 
 # Compile Flask-Babel translations
 RUN pybabel compile -d translations
 
 EXPOSE 5000
 
-CMD ["gunicorn", "--workers", "2", "--bind", "0.0.0.0:5000", "--factory", "app:create_app"]
+CMD ["gunicorn", "--workers", "2", "--bind", "0.0.0.0:5000", "app:create_app()"]

server/Dockerfile

@@ -23,4 +23,4 @@ RUN mkdir -p uploads/images uploads/pdfs uploads/logos uploads/reports
 EXPOSE 8000
 
 # Entry point: Alembic upgrade + Uvicorn
-CMD ["sh", "-c", "alembic upgrade head && uvicorn main:app --host 0.0.0.0 --port 8000 --workers 2"]
+CMD ["sh", "-c", "alembic -c migrations/alembic.ini upgrade head && uvicorn main:app --host 0.0.0.0 --port 8000 --workers 2"]

server/migrations/alembic.ini

@@ -1,5 +1,5 @@
 [alembic]
-script_location = .
+script_location = %(here)s
 sqlalchemy.url = mysql+asyncmy://tmflow:change_me_in_production@localhost:3306/tiemeasureflow
 
 [loggers]