Update Dockerfile to build rpds (pyo3) dependency

Author: p1c2u

Dockerfile

@@ -1,7 +1,21 @@
-FROM python:3.11-alpine
-
 ARG OPENAPI_SPEC_VALIDATOR_VERSION=0.6.0a1
 
-RUN pip install --no-cache-dir --pre openapi-spec-validator==${OPENAPI_SPEC_VALIDATOR_VERSION}
+FROM python:3.11.4-alpine as builder
+
+ARG OPENAPI_SPEC_VALIDATOR_VERSION
+
+ENV CARGO_REGISTRIES_CRATES_IO_PROTOCOL=sparse
+
+RUN apk add --no-cache cargo
+RUN python -m pip wheel --wheel-dir /wheels openapi-spec-validator==${OPENAPI_SPEC_VALIDATOR_VERSION}
+
+FROM python:3.11.4-alpine
+
+ARG OPENAPI_SPEC_VALIDATOR_VERSION
+
+COPY --from=builder /wheels /wheels
+RUN apk add --no-cache libgcc
+RUN pip install --no-cache-dir --pre --find-links /wheels openapi-spec-validator==${OPENAPI_SPEC_VALIDATOR_VERSION} && \
+    rm -r /wheels
 
 ENTRYPOINT ["openapi-spec-validator"]