Create dockerfile for ubuntu

docker/ubuntu.Dockerfile

@@ -0,0 +1,10 @@
+FROM ubuntu:latest
+
+RUN apt update && \
+    apt install -y build-essential cmake git libcap-dev wget rapidjson-dev
+
+WORKDIR /src/
+
+COPY . /src/
+
+RUN make -j 8 JSONRPC=ON