add dockerfile for generating docs

docs.Dockerfile

@@ -0,0 +1,16 @@
+FROM mcr.microsoft.com/dotnet/sdk:6.0 
+COPY . /indico-client-csharp
+WORKDIR /indico-client-csharp
+RUN dotnet tool install docfx
+RUN dotnet tool run docfx docfx_project/docfx.json 
+
+# ARG COMMIT_MSG=${git log -1 --pretty=%B}
+# # use devops sa github pat to interact with readme docs repo
+# WORKDIR /
+# RUN git clone [email protected]:IndicoDataSolutions/indico-readme.git
+# RUN git checkout -b csharp-docs
+# COPY /indico-client-csharp/_site /indico-readme/sdks/csharp
+# RUN git add --all && git commit -m ${COMMIT_MSG} && git push -u origin csharp-docs
+
+
+