Do a large chunk of the move to go

This commit moves a huge chunk of the code to go. The TODO.md document
indicates what is left to be done.

env/stack.go

@@ -0,0 +1,30 @@
+package env
+
+import (
+	"path/filepath"
+
+	"github.com/FAU-CDI/wisski-distillery/internal/stack"
+)
+
+// Stacks returns the Stacks of this distillery
+func (dis *Distillery) Stacks() []stack.Installable {
+	// TODO: Do we want to cache these stacks?
+	return []stack.Installable{
+		dis.WebStack(),
+		dis.SelfStack(),
+		dis.ResolverStack(),
+		dis.SSHStack(),
+		dis.TriplestoreStack(),
+		dis.SQLStack(),
+	}
+}
+
+// asCoreStack treats the provided stack as a core component of this distillery.
+func (dis *Distillery) asCoreStack(stack stack.Installable) stack.Installable {
+	stack.Dir = filepath.Join(dis.Config.DeployRoot, "core", stack.Name)
+
+	stack.ContextResource = filepath.Join("resources", "compose", stack.Name)
+	stack.EnvFileResource = filepath.Join("resources", "templates", "docker-env", stack.Name)
+
+	return stack
+}