Cannot import third party packages

I am trying to use a third party package within my gophernote and got the following error

```
repl.go:3:2: error loading package "gorm.io/driver/postgres" metadata, maybe you need to download (go get), compile (go build) and install (go install) it? can't find import: "gorm.io/driver/postgres"
```

now i `docker exec -it gophernotes sh` and then ran

```
/ # go get gorm.io/driver/postgres
# github.com/jackc/pgx/internal/sanitize
go/src/github.com/jackc/pgx/internal/sanitize/sanitize.go:85:15: undefined: strings.ReplaceAll
# gorm.io/gorm/utils
go/src/gorm.io/gorm/utils/utils.go:49:30: reflect.ValueOf(val).IsZero undefined (type reflect.Value has no field or method IsZero)
# github.com/jackc/pgconn
go/src/github.com/jackc/pgconn/errors.go:25:9: undefined: errors.As
go/src/github.com/jackc/pgconn/pgconn.go:221:6: undefined: errors.As
go/src/github.com/jackc/pgconn/pgconn.go:462:6: undefined: errors.As
go/src/github.com/jackc/pgconn/pgconn.go:472:15: undefined: errors.As
go/src/github.com/jackc/pgconn/pgconn.go:490:15: undefined: errors.As
# github.com/jackc/pgtype
go/src/github.com/jackc/pgtype/aclitem_array.go:89:49: reflectedValue.IsZero undefined (type reflect.Value has no field or method IsZero)
go/src/github.com/jackc/pgtype/bool_array.go:92:49: reflectedValue.IsZero undefined (type reflect.Value has no field or method IsZero)
go/src/github.com/jackc/pgtype/bpchar_array.go:92:49: reflectedValue.IsZero undefined (type reflect.Value has no field or method IsZero)
go/src/github.com/jackc/pgtype/bytea_array.go:73:49: reflectedValue.IsZero undefined (type reflect.Value has no field or method IsZero)
go/src/github.com/jackc/pgtype/cidr_array.go:112:49: reflectedValue.IsZero undefined (type reflect.Value has no field or method IsZero)
go/src/github.com/jackc/pgtype/date_array.go:93:49: reflectedValue.IsZero undefined (type reflect.Value has no field or method IsZero)
go/src/github.com/jackc/pgtype/enum_array.go:89:49: reflectedValue.IsZero undefined (type reflect.Value has no field or method IsZero)
go/src/github.com/jackc/pgtype/float4_array.go:92:49: reflectedValue.IsZero undefined (type reflect.Value has no field or method IsZero)
go/src/github.com/jackc/pgtype/float8_array.go:92:49: reflectedValue.IsZero undefined (type reflect.Value has no field or method IsZero)
go/src/github.com/jackc/pgtype/hstore_array.go:73:49: reflectedValue.IsZero undefined (type reflect.Value has no field or method IsZero)
go/src/github.com/jackc/pgtype/hstore_array.go:73:49: too many errors
```

how do we install third party packages to use in gophernote?

why is there no doc in README about how to do this?!?