Update installation doc (#2019)

* Update installation doc

* Update install scripts

* Update install scripts

infra/dev/postgres/init.sql

@@ -12,43 +12,11 @@ COMMENT ON SCHEMA "public" IS '@graphql({"inflect_names": true})';
 -- Connect to the "default" database
 \c "default";
 
--- Create extension
-CREATE EXTENSION IF NOT EXISTS pg_graphql;
-
--- Create the metadata schema if it doesn't exist
-CREATE SCHEMA IF NOT EXISTS "metadata";
-GRANT ALL ON SCHEMA metadata TO twenty;
-
 -- Create extension uuid-ossp
 CREATE EXTENSION IF NOT EXISTS "uuid-ossp";
 
--- Create GraphQL Entrypoint
-create function graphql(
-    "operationName" text default null,
-    query text default null,
-    variables jsonb default null,
-    extensions jsonb default null
-)
-    returns jsonb
-    language sql
-as $$
-    select graphql.resolve(
-        query := query,
-        variables := coalesce(variables, '{}'),
-        "operationName" := "operationName",
-        extensions := extensions
-    );
-$$;
-
 -- Create the tests database for e2e testing
 CREATE DATABASE "test";
 
 -- Connect to the "test" database for e2e testing
 \c "test";
-
--- Create the metadata schema if it doesn't exist
-CREATE SCHEMA IF NOT EXISTS "metadata";
-GRANT ALL ON SCHEMA metadata TO twenty;
-
--- Create extension uuid-ossp
-CREATE EXTENSION IF NOT EXISTS "uuid-ossp";