I followed strap's guide to an google app engine deployment however when I pushed it to gcloud I get an error 500. It's on postgresql, Standard Environment. I don't know what other informations to include. Here's the error from gcloud.

    2020-07-11T21:37:04.742759Z     at DatabaseManager.initialize (/srv/node_modules/strapi-database/lib/database-manager.js:36:27) A 
2020-07-11T21:37:04.742769Z     at Strapi.load (/srv/node_modules/strapi/lib/Strapi.js:274:19) A 
2020-07-11T21:55:09.103534Z GET 500 0 B 11.3 s Chrome 83 / I GET 500 0 B 11.3 s Chrome 83 5f0a353d00ff01946e3ca1b9ce0001737e736b756c70740001323032303037313174313635323139000100
2020-07-11T21:55:19.559829Z [2020-07-11T21:55:19.558Z] debug ⛔️ Server wasn't able to start properly. A 
2020-07-11T21:55:19.562896Z [2020-07-11T21:55:19.562Z] error Error: EROFS: read-only file system, mkdir '/srv/.tmp' A 
2020-07-11T21:55:19.562935Z     at Object.mkdirSync (fs.js:757:3) A 
2020-07-11T21:55:19.562956Z     at _.forEach (/srv/node_modules/strapi-connector-bookshelf/lib/knex.js:152:16) A 
2020-07-11T21:55:19.562972Z     at /srv/node_modules/lodash/lodash.js:4925:15 A 
2020-07-11T21:55:19.562987Z     at baseForOwn (/srv/node_modules/lodash/lodash.js:2990:24) A 
2020-07-11T21:55:19.563012Z     at /srv/node_modules/lodash/lodash.js:4894:18 A 
2020-07-11T21:55:19.563025Z     at Function.forEach (/srv/node_modules/lodash/lodash.js:9368:14) A 
2020-07-11T21:55:19.563034Z     at module.exports.strapi (/srv/node_modules/strapi-connector-bookshelf/lib/knex.js:37:5) A 
2020-07-11T21:55:19.563043Z     at Object.initialize (/srv/node_modules/strapi-connector-bookshelf/lib/index.js:39:5) A 
2020-07-11T21:55:19.563058Z     at Object.initialize (/srv/node_modules/strapi-database/lib/connector-registry.js:30:25) A 
2020-07-11T21:55:19.563071Z     at DatabaseManager.initialize (/srv/node_modules/strapi-database/lib/database-manager.js:36:27) A 
2020-07-11T21:55:19.563080Z     at Strapi.load (/srv/node_modules/strapi/lib/Strapi.js:274:19) A 
2020-07-11T21:55:20.688345Z GET 500 0 B 4.5 s Chrome 83 /favicon.ico I GET 500 0 B 4.5 s Chrome 83 5f0a354800ff0a80d9edd664c60001737e736b756c70740001323032303037313174313635323139000100

I tried launching it multiple times but same error. All of the postgresql information are correct as well. What is causing this?

Edit:

this is the instructions that I followed. https://strapi.io/documentation/v3.x/deployment/google-app-engine.html

I got up to deploy the project with gcloud app deploy