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

internal/environment/template-environment-job.hcl

@@ -0,0 +1,79 @@
+// This is the default job configuration that is used when no path to another default configuration is given
+
+job "template-0" {
+  datacenters = ["dc1"]
+  type = "batch"
+
+  group "default-group" {
+    ephemeral_disk {
+      migrate = false
+      size    = 10
+      sticky  = false
+    }
+    count = 1
+    scaling {
+      enabled = true
+      min = 0
+      max = 300
+    }
+    spread {
+      // see https://www.nomadproject.io/docs/job-specification/spread#even-spread-across-data-center
+      // This spreads the load evenly amongst our nodes
+      attribute = "${node.unique.name}"
+      weight = 100
+    }
+
+    task "default-task" {
+      driver = "docker"
+      kill_timeout = "0s"
+      kill_signal = "SIGKILL"
+
+      config {
+        image = "drp.codemoon.xopic.de/openhpi/co_execenv_python:3.8"
+        command = "sleep"
+        args = ["infinity"]
+        network_mode = "none"
+      }
+
+      logs {
+        max_files     = 1
+        max_file_size = 1
+      }
+
+      resources {
+        cpu    = 40
+        memory = 40
+      }
+
+      restart {
+        delay = "0s"
+      }
+    }
+  }
+
+  group "config" {
+    // We want to store whether a task is in use in order to recover from a downtime.
+    // Without a separate config task, marking a task as used would result in a restart of that task,
+    // as the meta information is passed to the container as environment variables.
+    count = 0
+    task "config" {
+      driver = "exec"
+      config {
+        command = "true"
+      }
+      logs {
+        max_files     = 1
+        max_file_size = 1
+      }
+      resources {
+        // minimum values
+        cpu    = 1
+        memory = 10
+      }
+    }
+    meta {
+      used = "false"
+      prewarmingPoolSize = "0"
+    }
+  }
+}