Add message for instrument creation problems

Change-Id: I1d91d7ea3a66cdec62d9c667eeebc30d5bd1e30b

src/instruments/instruments.controller.ts

@@ -53,13 +53,16 @@ export class InstrumentsController {
     @Body() createInstrumentDto: CreateInstrumentDto,
   ): Promise<Instrument> {
     try {
-      const instrument = await this.instrumentsService.create(
-        createInstrumentDto,
-      );
+      const instrument =
+        await this.instrumentsService.create(createInstrumentDto);
       return instrument;
-    } catch (e) {
+    } catch (error) {
+      let message;
+      if (error instanceof Error) message = error.message;
+      else message = String(error);
+      // we'll proceed, but let's report it
       throw new HttpException(
-        "Instrument with the same unique name already exists",
+        `Instrument with the same unique name already exists: ${message}`,
         HttpStatus.BAD_REQUEST,
       );
     }