Alfresco Content App Configuration problems

[KarekMedAM]

I installed the Alfresco Content App follwing this guide: https://www.alfresco.com/abn/adf/docs/getting-started/

I have ACS 7.0 installed and running on localhost 8080 (installed with ZIP)

when I run my app using ng serve (npm start didn't work), I get this error: (I cannot login uising admin/admin)

I created an .env file in the root folder and set this variable:

APP_CONFIG_ECM_HOST="http://localhost:8080"

PS: I can't find app.config.json anywhere in my app folder. However I find app.config.json.tpl which seems the same!!!

Where is the problem and how I may fix it please?

Thank you in advance 

[KarekMedAM · Accepted solution]

I fixed it.

Apparently the problem was because npm start didn't work for some reason, so the preinstall command didn't excuted

so I had to run it manually and it works!

mkdir -p ./app/.tmp && npm run assemble-app-config && npm run validate-app-config

ng serve

[sherwinf]

I just tried v2.11.0 and npm start failed for me, but the reason is displayed in the output:

error:  /home/mav/dev/alfresco-content-app/app/.tmp/app.config.json: Unexpected token $ in JSON at position 346

Taking a look at the app/.tmp/app.config.json file shows two variables that didn't get substituted which leads to invalid json. These must be new requirements in a recent update.

...
  "plugins": {
    "aosPlugin": ${APP_CONFIG_PLUGIN_AOS},
    "contentService": ${APP_CONFIG_PLUGIN_CONTENT_SERVICE}
  },
...

After adding the missing variables to my .env npm start worked as expected. These 

APP_CONFIG_ECM_HOST=http://localhost:8080
APP_CONFIG_PLUGIN_AOS=true
APP_CONFIG_PLUGIN_CONTENT_SERVICE=true

Hope this helps someone.