Restructure project

We previously didn't really had any structure in our project apart
from creating a new folder for each package in our project root.
Now that we have accumulated some packages, we use the well-known
Golang project layout in order to clearly communicate our intent
with packages. See https://github.com/golang-standards/project-layout

deploy/nomad-ci/Dockerfile

@@ -0,0 +1,37 @@
+# Simple image containing the Nomad binary to deploy Nomad jobs
+
+FROM golang:latest
+
+# Install prerequisites, gettext contains envsubst used in the CI
+RUN apt-get update && \
+    apt install -y \
+        unzip \
+        wget \
+        gettext \
+        apt-transport-https \
+        ca-certificates \
+        curl \
+        gnupg \
+        lsb-release && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists
+
+RUN curl -fsSL https://download.docker.com/linux/debian/gpg | gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
+RUN echo \
+      "deb [arch=amd64 signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/debian \
+      $(lsb_release -cs) stable" | tee /etc/apt/sources.list.d/docker.list > /dev/null
+RUN apt-get update && \
+    apt-get install -y docker-ce docker-ce-cli containerd.io && \
+    rm -rf /var/lib/apt/lists
+
+# Download Nomad
+RUN wget "https://releases.hashicorp.com/nomad/1.1.1/nomad_1.1.1_linux_amd64.zip" && \
+    wget "https://releases.hashicorp.com/nomad/1.1.1/nomad_1.1.1_SHA256SUMS" && \
+    grep "nomad_1.1.1_linux_amd64.zip" nomad_1.1.1_SHA256SUMS | sha256sum -c - && \
+    unzip nomad_1.1.1_linux_amd64.zip
+
+# Install Nomad
+RUN mv nomad /usr/sbin/ && nomad -version
+
+COPY nomad-run-and-wait /usr/sbin/
+RUN chmod +x /usr/sbin/nomad-run-and-wait