Creating Dockerfile to /contrib/docker/

- Multiple architectures supported by using Golang's official Debian Stretch image.
- Upgrading os to latest updates
- Adding all files to image
- Creating user for yggdrasil (kinda unused)
- Building from source code

contrib/docker/Dockerfile

@@ -0,0 +1,18 @@
+FROM golang:stretch
+MAINTAINER Christer Waren/CWINFO "christer.waren@cwinfo.org"
+
+RUN apt-get update \
+    && apt-get upgrade -y
+
+ADD . /src
+
+WORKDIR /src
+
+RUN adduser --system --home /etc/yggdrasil-network --uid 1000 yggdrasil-network \
+    && rm -rf build_* && ./build \
+    && cp yggdrasil /usr/bin \
+    && cp contrib/docker/entrypoint.sh /
+
+VOLUME [ "/etc/yggdrasil-network" ]
+
+ENTRYPOINT [ "/entrypoint.sh" ]