El error enconcreto es este
Error: Please install pg package manually
at ConnectionManager._loadDialectModule (/var/task/node_modules/sequelize/lib/dialects/abstract/connection-manager.js:55:15)
at new ConnectionManager (/var/task/node_modules/sequelize/lib/dialects/postgres/connection-manager.js:15:24)
at new PostgresDialect (/var/task/node_modules/sequelize/lib/dialects/postgres/index.js:13:30)
at new Sequelize (/var/task/node_modules/sequelize/lib/sequelize.js:194:20)
at Object. (/var/task/src/config/database.js:4:19)
at Module._compile (node:internal/modules/cjs/loader:1364:14)
at Module._extensions..js (node:internal/modules/cjs/loader:1422:10)
at Module.load (node:internal/modules/cjs/loader:1203:32)
at Module._load (node:internal/modules/cjs/loader:1019:12)
at /opt/rust/nodejs.js:2:12456
Node.js process exited with exit status: 1. The logs above can help with debugging the issue.
Error: Please install pg package manually
at ConnectionManager._loadDialectModule (/var/task/node_modules/sequelize/lib/dialects/abstract/connection-manager.js:55:15)
at new ConnectionManager (/var/task/node_modules/sequelize/lib/dialects/postgres/connection-manager.js:15:24)
at new PostgresDialect (/var/task/node_modules/sequelize/lib/dialects/postgres/index.js:13:30)
at new Sequelize (/var/task/node_modules/sequelize/lib/sequelize.js:194:20)
at Object. (/var/task/src/config/database.js:4:19)
at Module._compile (node:internal/modules/cjs/loader:1364:14)
at Module._extensions..js (node:internal/modules/cjs/loader:1422:10)
at Module.load (node:internal/modules/cjs/loader:1203:32)
at Module._load (node:internal/modules/cjs/loader:1019:12)
at /opt/rust/nodejs.js:2:12456
Node.js process exited with exit status: 1. The logs above can help with debugging the issue.
Tengo otras aplicaciones desplegadas correctamente con facilidad con pg y nunca me dieron problemas