feat: add buf Dockerfile

Author: Josh Newman

buf.Dockerfile

@@ -0,0 +1,13 @@
+FROM golang:1.19-alpine3.16 as golang
+
+RUN go install github.com/golang/protobuf/[email protected]
+
+WORKDIR /workspace
+
+COPY api ./api
+
+FROM bufbuild/buf:1.7.0 as buf
+
+COPY --from=golang /go/bin/protoc-gen-go /usr/local/bin/
+
+ENTRYPOINT ["buf"]