Fix Docker deployment inputs

Include all addon workspaces and vendored dependencies in image builds, and expose deploy time plus commit metadata on the home page.

Amp-Thread-ID: https://ampcode.com/threads/T-01a033d4-0e44-708e-af0e-6166283416ff
Co-authored-by: Heaust Azure <heaust.azure@gmail.com>

server/app.go

@@ -13,6 +13,7 @@ import (
 	"path"
 	"strconv"
 	"strings"
+	"time"
 )
 
 //go:embed web
@@ -40,6 +41,13 @@ func newApplication(store *playgroundStore, packages map[string]memoryAsset, mon
 		if err != nil {
 			return nil, err
 		}
+		if name == "home.html" {
+			logMessage, err := json.Marshal(deploymentLogMessage())
+			if err != nil {
+				return nil, err
+			}
+			content = bytes.Replace(content, []byte("__YAWN_DEPLOYMENT_LOG__"), logMessage, 1)
+		}
 		pages[name] = content
 	}
 	return &application{
@@ -51,6 +59,22 @@ func newApplication(store *playgroundStore, packages map[string]memoryAsset, mon
 	}, nil
 }
 
+func deploymentLogMessage() string {
+	deployedAt := "unknown"
+	if value := os.Getenv("YAWN_DEPLOYED_AT"); value != "" {
+		deployedAt = value
+		if parsed, err := time.Parse(time.RFC3339, value); err == nil {
+			ist := time.FixedZone("IST", 5*60*60+30*60)
+			deployedAt = parsed.In(ist).Format("2 January 2006, 03:04:05 PM MST")
+		}
+	}
+	commitMessage := strings.TrimSpace(os.Getenv("YAWN_DEPLOY_COMMIT_MESSAGE"))
+	if commitMessage == "" {
+		commitMessage = "unknown"
+	}
+	return fmt.Sprintf("Yawn deployed at %s\nLatest commit: %s", deployedAt, commitMessage)
+}
+
 func (app *application) routes() http.Handler {
 	mux := http.NewServeMux()
 	mux.HandleFunc("/healthz", app.health)

server/app_test.go

@@ -68,6 +68,25 @@ func TestHealth(t *testing.T) {
 	}
 }
 
+func TestHomeLogsDeploymentMetadata(t *testing.T) {
+	t.Setenv("YAWN_DEPLOYED_AT", "2026-08-24T18:30:00Z")
+	t.Setenv("YAWN_DEPLOY_COMMIT_MESSAGE", "Fix Docker deployment")
+	request := httptest.NewRequest(http.MethodGet, "/", nil)
+	response := httptest.NewRecorder()
+	testApplication(t).routes().ServeHTTP(response, request)
+	if response.Code != http.StatusOK {
+		t.Fatalf("status = %d", response.Code)
+	}
+	for _, expected := range []string{
+		`console.log("Yawn deployed at 25 August 2026, 12:00:00 AM IST\nLatest commit: Fix Docker deployment")`,
+		"<title>Yawn",
+	} {
+		if !bytes.Contains(response.Body.Bytes(), []byte(expected)) {
+			t.Fatalf("home page does not contain %q", expected)
+		}
+	}
+}
+
 func TestPlaygroundStoreMigratesLoadouts(t *testing.T) {
 	path := filepath.Join(t.TempDir(), "legacy.db")
 	database, err := sql.Open("sqlite3", path)

server/deploy-docker.sh

@@ -50,8 +50,14 @@ if [[ "$(git rev-parse HEAD)" != "$fetched" ]]; then
     exit 1
 fi
 
+deployed_at="$(date -u +'%Y-%m-%dT%H:%M:%SZ')"
+commit_message="$(git log -1 --format=%s)"
+
 printf 'Building the production image...\n'
-"${compose[@]}" build --pull yawn
+"${compose[@]}" build --pull \
+    --build-arg "YAWN_DEPLOYED_AT=$deployed_at" \
+    --build-arg "YAWN_DEPLOY_COMMIT_MESSAGE=$commit_message" \
+    yawn
 "${compose[@]}" up -d --remove-orphans yawn
 
 container="$("${compose[@]}" ps -q yawn)"

server/web/home.html

@@ -13,6 +13,9 @@
     <link rel="stylesheet" href="/assets/site.css" />
     <link rel="stylesheet" href="/assets/theme.css" />
     <script type="module" src="/assets/site.js"></script>
+    <script>
+      console.log(__YAWN_DEPLOYMENT_LOG__);
+    </script>
   </head>
   <body>
     <header class="site-header">