O caminho é o mesmo que está na página do curso:
<img class="img-fluid d-none d-sm-block"
src="/assets/img/home.jpg" alt="Welcome">
E tbm já alterei esta url de tudo quanto é forma pra ver se de algum jeito funcionava, mas não deu certo.
Nos fontes, o arquivo de imagem está em: alurapic\src\assets\img\home.jpg
Tem um detalhe que percebi agora... No console, logo abaixo da mensagem de que a figura não pôde ser carregada, aparece a seguinte mensagem:
zone.js:2969 XHR finished loading: GET "http://localhost:4200/sockjs-node/info?t=1548516453179".
scheduleTask @ zone.js:2969
push../node_modules/zone.js/dist/zone.js.ZoneDelegate.scheduleTask @ zone.js:407
push../node_modules/zone.js/dist/zone.js.Zone.scheduleTask @ zone.js:232
push../node_modules/zone.js/dist/zone.js.Zone.scheduleMacroTask @ zone.js:255
scheduleMacroTaskWithCurrentZone @ zone.js:1114
(anonymous) @ zone.js:3001
proto.(anonymous function) @ zone.js:1394
AbstractXHRObject.start @ sockjs.js:1601
(anonymous) @ sockjs.js:1490
push../nodemodules/zone.js/dist/zone.js.ZoneDelegate.invokeTask @ zone.js:421
push../node_modules/zone.js/dist/zone.js.Zone.runTask @ zone.js:188
push../node_modules/zone.js/dist/zone.js.ZoneTask.invokeTask @ zone.js:496
ZoneTask.invoke @ zone.js:485
timer @ zone.js:2054
setTimeout (async)
scheduleTask @ zone.js:2075
push../node_modules/zone.js/dist/zone.js.ZoneDelegate.scheduleTask @ zone.js:407
push../node_modules/zone.js/dist/zone.js.Zone.scheduleTask @ zone.js:232
push../node_modules/zone.js/dist/zone.js.Zone.scheduleMacroTask @ zone.js:255
scheduleMacroTaskWithCurrentZone @ zone.js:1114
(anonymous) @ zone.js:2090
proto.(anonymous function) @ zone.js:1394
AbstractXHRObject @ sockjs.js:1489
XHRLocalObject @ sockjs.js:2910
InfoAjax @ sockjs.js:356
InfoReceiver.getReceiver @ sockjs.js:536
InfoReceiver.doXhr @ sockjs.js:556
(anonymous) @ sockjs.js:525
push../nodemodules/zone.js/dist/zone.js.ZoneDelegate.invokeTask @ zone.js:421
push../node_modules/zone.js/dist/zone.js.Zone.runTask @ zone.js:188
push../node_modules/zone.js/dist/zone.js.ZoneTask.invokeTask @ zone.js:496
ZoneTask.invoke @ zone.js:485
timer @ zone.js:2054
setTimeout (async)
scheduleTask @ zone.js:2075
push../node_modules/zone.js/dist/zone.js.ZoneDelegate.scheduleTask @ zone.js:407
push../node_modules/zone.js/dist/zone.js.Zone.scheduleTask @ zone.js:232
push../node_modules/zone.js/dist/zone.js.Zone.scheduleMacroTask @ zone.js:255
scheduleMacroTaskWithCurrentZone @ zone.js:1114
(anonymous) @ zone.js:2090
proto.(anonymous function) @ zone.js:1394
InfoReceiver @ sockjs.js:524
SockJS @ sockjs.js:730
initSocket @ socket.js:9
(anonymous) @ client?719c:211
./node_modules/webpack-dev-server/client/index.js?http://0.0.0.0:0 @ vendor.js:85739
webpack_require @ bootstrap:81
0 @ main.ts:12
webpack_require @ bootstrap:81
checkDeferredModules @ bootstrap:43
webpackJsonpCallback @ bootstrap:30
(anonymous) @ main.js:1