Add initial project structure with Dockerfile, Kubernetes manifests, and FastAPI application

Dockerfile

@@ -0,0 +1,18 @@
+# TODO: napiši Dockerfile
+# Base image: python:3.12-slim
+# Working dir: /app
+# Kopiraj requirements.txt, pip install, zatim kopiraj app/
+# EXPOSE 8000
+# CMD uvicorn app.main:app --host 0.0.0.0 --port 8000
+FROM python:3.12-slim
+
+WORKDIR /app
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY app/ ./app/
+
+EXPOSE 8000
+
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]