Move code into new component package

This commit cleans up the resources in the 'embed' package, and instead
moves them into subpackages of a new 'compose' package. This makes sure
that '.env' templates and docker compose contexts are located in the
same location.

component/dis/dis.go

@@ -0,0 +1,51 @@
+package dis
+
+import (
+	"embed"
+
+	"github.com/FAU-CDI/wisski-distillery/component"
+	"github.com/FAU-CDI/wisski-distillery/core"
+	"github.com/FAU-CDI/wisski-distillery/internal/stack"
+)
+
+type Dis struct {
+	component.ComponentBase
+
+	// TODO: SQL Component
+
+	Executable string // path to the current executable
+}
+
+func (dis Dis) Name() string {
+	return "dis"
+}
+
+//go:embed all:stack dis.env
+var resources embed.FS
+
+func (dis Dis) Stack() stack.Installable {
+	return dis.ComponentBase.MakeStack(stack.Installable{
+		Resources:   resources,
+		ContextPath: "stack",
+		EnvPath:     "dis.env",
+
+		EnvContext: map[string]string{
+			"VIRTUAL_HOST":      dis.Config.DefaultVirtualHost(),
+			"LETSENCRYPT_HOST":  dis.Config.DefaultLetsencryptHost(),
+			"LETSENCRYPT_EMAIL": dis.Config.CertbotEmail,
+
+			"CONFIG_PATH": dis.Config.ConfigPath,
+			"DEPLOY_ROOT": dis.Config.DeployRoot,
+
+			"GLOBAL_AUTHORIZED_KEYS_FILE": dis.Config.GlobalAuthorizedKeysFile,
+			"SELF_OVERRIDES_FILE":         dis.Config.SelfOverridesFile,
+		},
+		CopyContextFiles: []string{core.Executable},
+	})
+}
+
+func (dis Dis) Context(parent stack.InstallationContext) stack.InstallationContext {
+	return stack.InstallationContext{
+		core.Executable: dis.Executable,
+	}
+}