Fix install order in Dockerfile to avoid cache invalidation

Dockerfile

@@ -10,13 +10,15 @@ COPY --from=ghcr.io/astral-sh/uv:0.10.9 /uv /usr/local/bin/uv
 
 ENV UV_COMPILE_BYTECODE=1
 
+# Install dependencies BEFORE copying source so an edit under src/
+# doesn't invalidate the cache of the (expensive) requirements-install layer. 
 COPY pyproject.toml requirements.txt README.md MANIFEST.in ./
-COPY src ./src
-
 RUN uv pip install --system --upgrade pip && \
     uv pip install --system build && \
-    uv pip install --system --prefix=/install -r requirements.txt && \
-    uv pip install --system --prefix=/install --no-deps .
+    uv pip install --system --prefix=/install -r requirements.txt
+
+COPY src ./src
+RUN uv pip install --system --prefix=/install --no-deps .
 
 # ---------------------------------------------------------------------------------------
 # PRODUCTION IMAGE

pyproject.toml

@@ -12,7 +12,7 @@ namespaces = false
 
 [project]
 name = "python-app-template"
-version = "0.2.1"
+version = "0.2.2"
 description = "A template for python (dockerized) applications."
 readme = "README.md"
 license = "Apache-2.0"