add tests and docker infra

Dockerfile

@@ -1,13 +1,70 @@
-FROM python:3.13-alpine
+# =====
+# > Python-Base
+# =====
 
-WORKDIR /app
+FROM python:3.13-slim-bookworm AS python-base
 
-RUN pip install uv
+ENV PYTHONUNBUFFERED=1 \
+    PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONOPTIMIZE=1 \
+    PIP_NO_CACHE_DIR=1 \
+    PIP_DISABLE_PIP_VERSION_CHECK=1 \
+    PIP_DEFAULT_TIMEOUT=100 \
+    APP_PATH="/app" \
+    UV_VERSION="0.8.19"
 
+ENV \
+    VIRTUAL_ENV="$APP_PATH/.venv" \
+    PATH="$VIRTUAL_ENV/bin:$PATH" \
+    PROJECT_PATH="$APP_PATH/src/template_project"
+
+WORKDIR $APP_PATH
+
+# =====
+# > Builder
+# =====
+
+FROM python-base AS template_project_builder
+
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends gcc git \
+    && rm -rf /var/lib/apt/lists
+
+RUN pip install --no-cache-dir "uv==$UV_VERSION"
 RUN mkdir -p ./src/
 
-COPY pyproject.toml /app/pyproject.toml
+COPY pyproject.toml $APP_PATH/pyproject.toml
+RUN uv venv -p 3.13 && uv pip install -e .
+COPY ./src/template_project $PROJECT_PATH
 
-RUN uv pip install -e . --system --no-cache
+# =====
+# > Deploy
+# =====
 
-COPY ./src/template_project /app/src/template_project
+FROM template_project_builder AS template_project_deploy
+
+COPY --from=template_project_builder $VIRTUAL_ENV $VIRTUAL_ENV
+
+# =====
+# > Tests
+# =====
+
+FROM template_project_builder AS template_project_tests
+
+COPY --from=template_project_builder $VIRTUAL_ENV $VIRTUAL_ENV
+
+RUN uv pip install --group tests
+
+COPY ./tests $APP_PATH/tests
+
+# =====
+# > Migrations
+# =====
+
+FROM template_project_builder AS template_project_migrations
+
+COPY --from=template_project_builder $VIRTUAL_ENV $VIRTUAL_ENV
+
+VOLUME $PROJECT_PATH/migrations
+
+RUN uv pip install --group migrations