Add docker dev enviroment

Dockerfile

@@ -0,0 +1,15 @@
+# RVSCC developer enviroment
+FROM alpine
+MAINTAINER Mario Romero <mario@1159.cl>
+
+# Install packages
+RUN echo "http://dl-cdn.alpinelinux.org/alpine/edge/testing" >> /etc/apk/repositories \
+  && apk update \
+  && apk add wget git make cmake gcc-riscv-none-elf newlib-riscv-none-elf verilator vim
+
+# Copy RISC-V repository into container
+COPY . /root
+
+# Initialize the enviroment
+WORKDIR /root
+CMD ["/bin/sh"]