Improve Docker-Compose Install Experience (#9781)

This PR updates the docker-compose installation documentation and env
sample to improve the setup experience.

- Updates the URLs for raw files to reference main branch, which is
likely where new users will be pulling from initially. This seems to be
the most straightforward option; assume that advanced users who want to
retrieve it from a particular tag will know to change the URL for their
scenario.
- Fixes an improperly stated curl command.
- Adds a note that the PGPASSWORD_SUPERUSER should be URL-safe. This is
required since the value is later concat into a PG_DATABASE_URL as a
URL, and expected to be in proper URL format. Touches on #8597.

---------

Co-authored-by: Félix Malfait <felix@twenty.com>
Co-authored-by: Félix Malfait <felix.malfait@gmail.com>

packages/twenty-docker/docker-compose.yml

@@ -21,7 +21,7 @@ services:
       - "3000:3000"
     environment:
       PORT: 3000
-      PG_DATABASE_URL: postgres://${PGUSER_SUPERUSER:-postgres}:${PGPASSWORD_SUPERUSER:-postgres}@${PG_DATABASE_HOST:-db:5432}/default
+      PG_DATABASE_URL: postgres://${PG_DATABASE_USER:-postgres}:${PG_DATABASE_PASSWORD:-postgres}@${PG_DATABASE_HOST:-db}:${PG_DATABASE_PORT:-5432}/default
       SERVER_URL: ${SERVER_URL}
       REDIS_URL: ${REDIS_URL:-redis://redis:6379}
 
@@ -47,7 +47,7 @@ services:
     image: twentycrm/twenty:${TAG:-latest}
     command: ["yarn", "worker:prod"]
     environment:
-      PG_DATABASE_URL: postgres://${PGUSER_SUPERUSER:-postgres}:${PGPASSWORD_SUPERUSER:-postgres}@${PG_DATABASE_HOST:-db:5432}/default
+      PG_DATABASE_URL: postgres://${PG_DATABASE_USER:-postgres}:${PG_DATABASE_PASSWORD:-postgres}@${PG_DATABASE_HOST:-db}:${PG_DATABASE_PORT:-5432}/default
       SERVER_URL: ${SERVER_URL}
       REDIS_URL: ${REDIS_URL:-redis://redis:6379}
       DISABLE_DB_MIGRATIONS: "true" # it already runs on the server
@@ -70,12 +70,12 @@ services:
     volumes:
       - db-data:/home/postgres/pgdata
     environment:
-      PGUSER_SUPERUSER: ${PGUSER_SUPERUSER:-postgres}
-      PGPASSWORD_SUPERUSER: ${PGPASSWORD_SUPERUSER:-postgres}
+      PGUSER_SUPERUSER: ${PG_DATABASE_USER:-postgres}
+      PGPASSWORD_SUPERUSER: ${PG_DATABASE_PASSWORD:-postgres}
       ALLOW_NOSSL: "true"
       SPILO_PROVIDER: "local"
     healthcheck:
-      test: pg_isready -U ${PGUSER_SUPERUSER:-postgres} -h localhost -d postgres
+      test: pg_isready -U ${PG_DATABASE_USER:-postgres} -h localhost -d postgres
       interval: 5s
       timeout: 5s
       retries: 10