keep console.log() when serving webapp

the removal of console and debugger statements by esbuild even when not
building for production seems to be a regression, as these were
definitely working in the past.

this change uses the command parameter to configure esbuild to either
keep or indeed remove the respective statements. they are only kept if
command is not "serve".

to avoid having to indent everything in defineConfig() by one block, the
return statement and closing curly brace were added "inline".

webapp/vite.config.ts

@@ -19,7 +19,7 @@ try {
 }
 
 // https://vitejs.dev/config/
-export default defineConfig({
+export default defineConfig(({ command }) => { return {
   plugins: [
     vue(),
     viteCompression({ deleteOriginFile: true, threshold: 0 }),
@@ -57,7 +57,7 @@ export default defineConfig({
     },
   },
   esbuild: {
-    drop: ['console', 'debugger'],
+    drop: command !== 'serve' ? ['console', 'debugger'] : []
   },
   server: {
     proxy: {
@@ -86,4 +86,4 @@ export default defineConfig({
       }
     }
   }
-})
+} })