feat(docs): add Dockerfile for building and serving documentation

Author: Akinator31

Dockerfile.docs

@@ -0,0 +1,11 @@
+FROM peaceiris/mdbook:latest AS builder
+
+WORKDIR /app
+COPY docs/ ./docs/
+RUN mdbook build docs
+
+FROM nginx:alpine AS runtime
+
+COPY --from=builder /app/docs/book/ /usr/share/nginx/html/
+
+EXPOSE 80