fix: exposed port 5432 on db to try to fix db not resolved in flyio

docker-compose.yml

@@ -1,7 +1,7 @@
 services:
   flask:
     # adding this ****ing little **** took at least 3 hours of debugging
-    command: sh -c "gunicorn -w 4 flaskr:app -b 0.0.0.0:5000 --access-logfile '-' --error-logfile '-'"
+    # command: sh -c "gunicorn -w 4 flaskr:app -b 0.0.0.0:5000 --access-logfile '-' --error-logfile '-'"
     build:
       context: .
       dockerfile: Dockerfile
@@ -36,6 +36,8 @@ services:
       - POSTGRES_USER
       - POSTGRES_PASSWORD
     restart: always
+    expose:
+      - 5432
     healthcheck:
       test: sh -c "pg_isready -d ${POSTGRES_DB} -U ${POSTGRES_USER}"
       interval: 3s