Never crash boot on plugin dropzone setup; default PLUGINS_DIR in image (#71)

The Test stage crash-looped: PluginWatcherService.onModuleInit did `mkdir`
on the default `./data/plugins` (→ /app/data, not writable by the non-root
user) and an unhandled EACCES aborted bootstrap. Two fixes:

- Harden the watcher: its dropzone is an optional convenience over the GUI
  upload, so a setup failure now logs a warning and disables drop-to-install
  instead of taking down the api.
- Bake writable defaults (UPLOADS_DIR/PLUGINS_DIR=/data/…) into the api image
  so it works out of the box even where compose does not set them; compose
  still mounts named volumes there for persistence.

Migrations applied cleanly ("No pending migrations"); this was purely the
boot-time directory permission.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EwZ4jR4KFAPvpjWevfUGX1

apps/api/Dockerfile

@@ -25,7 +25,10 @@ RUN pnpm install --frozen-lockfile --filter @dorfteich/api... \
 
 FROM node:22.15-alpine
 ARG APP_VERSION=0.0.0-dev
-ENV NODE_ENV=production APP_VERSION=${APP_VERSION}
+# Default the data dirs to the writable, node-owned locations created below, so
+# the image works out of the box even where compose does not set them; compose
+# still mounts named volumes here for persistence (UPLOADS_DIR/PLUGINS_DIR).
+ENV NODE_ENV=production APP_VERSION=${APP_VERSION} UPLOADS_DIR=/data/uploads PLUGINS_DIR=/data/plugins
 WORKDIR /app
 COPY --from=build --chown=node:node /out /app
 # Generate the Prisma client for this image's platform.

apps/api/src/plugins/plugin-watcher.service.ts

@@ -39,12 +39,22 @@ export class PluginWatcherService implements OnModuleInit, OnModuleDestroy {
 
   async onModuleInit(): Promise<void> {
     if (this.config.env.NODE_ENV === 'test') return;
+    // The dropzone is an optional convenience over the GUI upload. If its
+    // directory cannot be created or watched (e.g. PLUGINS_DIR is not writable
+    // on this deployment), log and carry on — it must never take down the api.
+    try {
       await this.storage.ensureServiceDirs();
       this.watcher = watch(this.storage.dropzoneDir, (_event, filename) => {
         if (!filename || !filename.endsWith('.zip')) return;
         this.schedule(filename.toString());
       });
       this.logger.info({ dir: this.storage.dropzoneDir }, 'watching plugin dropzone');
+    } catch (error) {
+      this.logger.warn(
+        { err: error, dir: this.storage.dropzoneDir },
+        'plugin dropzone unavailable; drop-to-install disabled (GUI upload still works)',
+      );
+    }
   }
 
   onModuleDestroy(): void {