feat: add Python-alpine Dockerfile for enhanced build process and testing with id-configurator

Signed-off-by: d9pouces <github@19pouces.net>

tests/dockerfiles/Npm.Dockerfile

@@ -0,0 +1,12 @@
+FROM node:20-slim AS target
+FROM interdiode/id-configurator:latest AS configuration
+COPY --from=target / /src/
+COPY --from=generated-config Npm.yaml /config.yaml
+RUN id-configurator apply --config /config.yaml --src /src --dst /dst
+FROM target AS runtime
+COPY --from=configuration /dst/ /
+RUN mkdir -p /tmp/npmtest && cd /tmp/npmtest \
+    && npm init -y >/dev/null \
+    && npm install idconfiguratortestpkg \
+    && grep -qx 'test-only package served by the id-configurator integration tests' \
+       node_modules/idconfiguratortestpkg/marker.txt