diff --git a/.project/infrastructure/services/keycloak/dew_keycloak-postgresql.container b/.project/infrastructure/services/keycloak/dew_keycloak-postgresql.container
index c51c31a..c9a6dca 100644
--- a/.project/infrastructure/services/keycloak/dew_keycloak-postgresql.container
+++ b/.project/infrastructure/services/keycloak/dew_keycloak-postgresql.container
@@ -8,7 +8,7 @@ Image=docker.io/library/postgres:18
 ContainerName=dew_keycloak-postgresql
 Network=dew_keycloak.network
 NetworkAlias=postgres
-Volume=dew_keycloak-postgresql.volume:/var/lib/postgresql/data
+Volume=dew_keycloak-postgresql.volume:/var/lib/postgresql
 Environment=POSTGRES_DB=keycloak
 Environment=POSTGRES_USER=keycloak
 Environment=POSTGRES_PASSWORD=keycloak_dev_password
diff --git a/.project/infrastructure/services/local-api-build/Containerfile b/.project/infrastructure/services/local-api-build/Containerfile
index af68d9f..92ff70e 100644
--- a/.project/infrastructure/services/local-api-build/Containerfile
+++ b/.project/infrastructure/services/local-api-build/Containerfile
@@ -1,8 +1,6 @@
-FROM docker.io/library/alpine:3.23
+FROM docker.io/library/nginx:alpine
 
-RUN mkdir -p /srv/www \
-  && printf '{"service":"local-api-build","status":"ok"}\n' > /srv/www/index.html
+RUN printf '{"service":"local-api-build","status":"ok"}\n' \
+  > /usr/share/nginx/html/index.html
 
-EXPOSE 8080
-
-CMD ["busybox", "httpd", "-f", "-p", "8080", "-h", "/srv/www"]
+EXPOSE 80
diff --git a/.project/infrastructure/services/local-api-build/dew_local-api-build.build b/.project/infrastructure/services/local-api-build/dew_local-api-build.build
index d47528f..5ea85d4 100644
--- a/.project/infrastructure/services/local-api-build/dew_local-api-build.build
+++ b/.project/infrastructure/services/local-api-build/dew_local-api-build.build
@@ -4,6 +4,7 @@ File=Containerfile
 SetWorkingDirectory=unit
 
 [Service]
+RemainAfterExit=yes
 TimeoutStartSec=900
 
 [Install]
diff --git a/.project/infrastructure/services/local-api-build/dew_local-api-build.container b/.project/infrastructure/services/local-api-build/dew_local-api-build.container
index e0a73ef..800f73f 100644
--- a/.project/infrastructure/services/local-api-build/dew_local-api-build.container
+++ b/.project/infrastructure/services/local-api-build/dew_local-api-build.container
@@ -6,7 +6,7 @@ After=dew_local-api-build.build
 [Container]
 Image=dew_local-api-build.build
 ContainerName=dew_local-api-build
-PublishPort=127.0.0.1:8090:8080
+PublishPort=127.0.0.1:8090:80
 
 [Service]
 Restart=always
diff --git a/.project/infrastructure/services/local-api-build/manifest.yaml b/.project/infrastructure/services/local-api-build/manifest.yaml
index 05a665f..16b8a34 100644
--- a/.project/infrastructure/services/local-api-build/manifest.yaml
+++ b/.project/infrastructure/services/local-api-build/manifest.yaml
@@ -11,6 +11,9 @@ quadlets:
     unit: dew_local-api-build.service
     container_name: dew_local-api-build
 
+files:
+  - Containerfile
+
 schemas:
   configure: schemas/configure.schema.json
   init: schemas/init.schema.json
diff --git a/.project/infrastructure/services/postgresql-18/dew_postgresql-18.container b/.project/infrastructure/services/postgresql-18/dew_postgresql-18.container
index cfb18e9..3f44e06 100644
--- a/.project/infrastructure/services/postgresql-18/dew_postgresql-18.container
+++ b/.project/infrastructure/services/postgresql-18/dew_postgresql-18.container
@@ -10,7 +10,7 @@ Environment=POSTGRES_DB=dew
 Environment=POSTGRES_USER=dew
 Environment=POSTGRES_PASSWORD=dew_dev_password
 PublishPort=127.0.0.1:5432:5432
-Volume=dew_postgresql-18_data:/var/lib/postgresql/data:Z
+Volume=dew_postgresql-18_data:/var/lib/postgresql:Z
 HealthCmd=pg_isready -U dew -d dew
 HealthInterval=10s
 HealthTimeout=5s
diff --git a/.project/kanban/done/DEW-0036.md b/.project/kanban/done/DEW-0036.md
new file mode 100644
index 0000000..81bbd7e
--- /dev/null
+++ b/.project/kanban/done/DEW-0036.md
@@ -0,0 +1,8 @@
+---
+id: DEW-0036
+title: Verify infra samples locally
+type: task
+created: 2026-05-05T04:28:49.175443Z
+---
+
+Bring up the new sample infrastructure services with dew infra, verify they start and respond as expected, then stop them without deleting retained data volumes.
diff --git a/docs/features/infra.md b/docs/features/infra.md
index f2e51d8..8e101cd 100644
--- a/docs/features/infra.md
+++ b/docs/features/infra.md
@@ -51,6 +51,9 @@ The `quadlets` list can contain any supported Podman Quadlet source type:
 from the Quadlet filename. Declare `unit` when the Quadlet file uses a
 `ServiceName=` override.
 
+Use `files` for non-Quadlet assets that must be installed beside the Quadlet
+files, such as a `Containerfile` used by a `.build` unit.
+
 The package-level schema for this file is
 `packages/infra/schemas/service-manifest.schema.json`.
 
diff --git a/packages/infra/lib/src/infra_repository.dart b/packages/infra/lib/src/infra_repository.dart
index 9ffd716..d6dd32e 100644
--- a/packages/infra/lib/src/infra_repository.dart
+++ b/packages/infra/lib/src/infra_repository.dart
@@ -167,6 +167,9 @@ class InfraValidator {
         issues,
       );
     }
+    for (final path in manifest.filePaths) {
+      await _requireFile(manifest, path, issues);
+    }
     await _validateJsonSchema(
       manifest,
       label: 'configure schema',
diff --git a/packages/infra/lib/src/infra_runtime.dart b/packages/infra/lib/src/infra_runtime.dart
index bbb3f18..0af8118 100644
--- a/packages/infra/lib/src/infra_runtime.dart
+++ b/packages/infra/lib/src/infra_runtime.dart
@@ -222,6 +222,12 @@ class PodmanQuadletRuntime implements ContainerRuntime {
           await fs.link(target).exists() || await fs.file(target).exists();
       if (!exists) return false;
     }
+    for (final file in manifest.files) {
+      final target = _targetFilePath(file, scope);
+      final exists =
+          await fs.link(target).exists() || await fs.file(target).exists();
+      if (!exists) return false;
+    }
     return true;
   }
 
@@ -268,6 +274,14 @@ class PodmanQuadletRuntime implements ContainerRuntime {
         }
       }
     }
+    for (var i = 0; i < manifest.files.length; i++) {
+      await _link(
+        actions,
+        dryRun,
+        manifest.filePaths[i],
+        _targetFilePath(manifest.files[i], scope),
+      );
+    }
 
     return InfraRuntimeResult(actions: actions);
   }
@@ -291,6 +305,9 @@ class PodmanQuadletRuntime implements ContainerRuntime {
         );
       }
     }
+    for (final file in manifest.files) {
+      await _deletePath(actions, dryRun, _targetFilePath(file, scope));
+    }
     return InfraRuntimeResult(actions: actions);
   }
 
@@ -409,6 +426,9 @@ class PodmanQuadletRuntime implements ContainerRuntime {
         p.basename(quadlet.file),
       );
 
+  String _targetFilePath(String file, InfraScope scope) =>
+      p.join(quadletSearchPath(scope, environment: environment), file);
+
   Future<void> _link(
     List<String> actions,
     bool dryRun,
@@ -416,6 +436,7 @@ class PodmanQuadletRuntime implements ContainerRuntime {
     String target,
   ) async {
     await _action(actions, dryRun, 'link $source -> $target', () async {
+      await fs.directory(p.dirname(target)).create(recursive: true);
       await _deleteIfExists(target);
       await fs.link(target).create(source, recursive: true);
     });
diff --git a/packages/infra/lib/src/service_manifest.dart b/packages/infra/lib/src/service_manifest.dart
index 461317a..1f5397c 100644
--- a/packages/infra/lib/src/service_manifest.dart
+++ b/packages/infra/lib/src/service_manifest.dart
@@ -153,6 +153,7 @@ class InfraServiceManifest {
     required this.serviceDir,
     required this.manifestPath,
     required this.quadlets,
+    this.files = const [],
     this.configureSchema,
     this.initSchema,
   });
@@ -175,6 +176,9 @@ class InfraServiceManifest {
   /// Quadlet files deployed for this service.
   final List<InfraQuadletManifest> quadlets;
 
+  /// Additional files installed beside Quadlets for build contexts or assets.
+  final List<String> files;
+
   /// Optional relative path to the configure JSON Schema.
   final String? configureSchema;
 
@@ -198,6 +202,9 @@ class InfraServiceManifest {
   /// Active init payload path.
   String get activeInitPath => p.join(configDir, 'init.json');
 
+  /// Absolute paths to additional installed files.
+  List<String> get filePaths => files.map(_resolve).toList();
+
   /// Units generated by the declared Quadlet files.
   List<String> get units =>
       quadlets.map((quadlet) => quadlet.serviceUnit).toList();
@@ -231,6 +238,7 @@ class InfraServiceManifest {
       serviceDir: serviceDir,
       manifestPath: manifestPath,
       quadlets: quadlets,
+      files: _optionalStringList(map, 'files'),
       configureSchema: schemas == null
           ? null
           : _optionalString(schemas, 'configure'),
@@ -246,6 +254,7 @@ class InfraServiceManifest {
     'manifest': manifestPath,
     'units': units,
     'quadlets': quadlets.map((quadlet) => quadlet.toJson()).toList(),
+    'files': filePaths,
     'configure_schema': configureSchemaPath,
     'init_schema': initSchemaPath,
     'active_config': activeConfigurePath,
@@ -311,6 +320,20 @@ List<dynamic> _requiredList(Map<String, dynamic> map, String key) {
   throw FormatException('manifest.yaml is missing list "$key".');
 }
 
+List<String> _optionalStringList(Map<String, dynamic> map, String key) {
+  final value = map[key];
+  if (value == null) return const [];
+  if (value is! List) {
+    throw FormatException('manifest.yaml field "$key" must be a list.');
+  }
+  return value.map((item) {
+    if (item is String && item.isNotEmpty) return item;
+    throw FormatException(
+      'manifest.yaml field "$key" must contain non-empty strings.',
+    );
+  }).toList();
+}
+
 String _requiredString(Map<String, dynamic> map, String key) {
   final value = _optionalString(map, key);
   if (value == null || value.isEmpty) {
diff --git a/packages/infra/schemas/service-manifest.schema.json b/packages/infra/schemas/service-manifest.schema.json
index 85ad2d0..9754bf7 100644
--- a/packages/infra/schemas/service-manifest.schema.json
+++ b/packages/infra/schemas/service-manifest.schema.json
@@ -61,6 +61,15 @@
         }
       }
     },
+    "files": {
+      "type": "array",
+      "description": "Additional files installed beside Quadlets, such as Containerfiles for build contexts.",
+      "items": {
+        "type": "string",
+        "minLength": 1,
+        "pattern": "^[^/].*$"
+      }
+    },
     "schemas": {
       "type": "object",
       "additionalProperties": false,
diff --git a/packages/infra/test/dew_infra_test.dart b/packages/infra/test/dew_infra_test.dart
index 9919cd7..defa4c8 100644
--- a/packages/infra/test/dew_infra_test.dart
+++ b/packages/infra/test/dew_infra_test.dart
@@ -115,7 +115,7 @@ void main() {
       'install dry-run reports symlink actions without writing files',
       () async {
         final fs = MemoryFileSystem.test();
-        _writeService(fs, includeNetwork: true);
+        _writeService(fs, includeNetwork: true, includeFile: true);
         final manifest = await InfraRepository(
           infraDir: '/project/.project/infrastructure',
           fs: fs,
@@ -133,6 +133,7 @@ void main() {
 
         expect(result.actions.join('\n'), contains('app_postgres.container'));
         expect(result.actions.join('\n'), contains('app_postgres.network'));
+        expect(result.actions.join('\n'), contains('Containerfile'));
         expect(
           await fs
               .link(
@@ -174,6 +175,7 @@ void _writeService(
   String serviceId = 'postgres',
   String unit = 'app_postgres.service',
   bool includeNetwork = false,
+  bool includeFile = false,
 }) {
   final serviceDir = fs.directory(
     '/project/.project/infrastructure/services/postgres',
@@ -188,6 +190,11 @@ void _writeService(
         .file('${serviceDir.path}/app_postgres.network')
         .writeAsStringSync('[Network]\nNetworkName=app_postgres\n');
   }
+  if (includeFile) {
+    fs
+        .file('${serviceDir.path}/Containerfile')
+        .writeAsStringSync('FROM scratch\n');
+  }
   fs
       .file('${serviceDir.path}/configure.schema.json')
       .writeAsStringSync('{"type":"object"}');
@@ -197,6 +204,13 @@ void _writeService(
   final networkQuadlet = includeNetwork
       ? '''
   - file: app_postgres.network
+'''
+      : '';
+  final files = includeFile
+      ? '''
+files:
+  - Containerfile
+
 '''
       : '';
   fs.file('${serviceDir.path}/manifest.yaml').writeAsStringSync('''
@@ -214,6 +228,7 @@ quadlets:
     profiles_dir: app_postgres.profiles.d
 $networkQuadlet
 
+$files
 schemas:
   configure: configure.schema.json
   init: init.schema.json
@@ -234,6 +249,7 @@ Map<String, Object?> _manifestObject() => {
     },
     {'file': 'app_postgres.network'},
   ],
+  'files': ['Containerfile'],
   'schemas': {'configure': 'configure.schema.json', 'init': 'init.schema.json'},
 };