Add initial nistec project files

internal/fiat/Dockerfile

@@ -0,0 +1,12 @@
+# Copyright 2021 The Go Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+FROM coqorg/coq:8.13.2
+
+RUN git clone https://github.com/mit-plv/fiat-crypto && cd fiat-crypto && \
+    git checkout 23d2dbc4ab897d14bde4404f70cd6991635f9c01 && \
+    git submodule update --init --recursive
+RUN cd fiat-crypto && eval $(opam env) && make -j4 standalone-ocaml SKIP_BEDROCK2=1
+
+ENV PATH /home/coq/fiat-crypto/src/ExtractionOCaml:$PATH