Run alembic migration in gunicorn on_start hoook

.s2i/environment

@@ -1,2 +1,2 @@
 UPGRADE_PIP_TO_LATEST=1
-APP_CONFIG=/opt/app-root/src/gunicorn.cfg
+APP_CONFIG=/opt/app-root/src/gunicorn.cfg.py

gunicorn.cfg

@@ -1,6 +0,0 @@
-import logging
-import sys
-
-gunicorn_logger = logging.getLogger('gunicorn.error')
-gunicorn_logger.addHandler(logging.StreamHandler(sys.stdout))
-bind = "0.0.0.0:8080"

gunicorn.cfg.py

@@ -0,0 +1,17 @@
+import logging
+import subprocess
+import sys
+import os
+
+
+def on_starting(server):
+    """Executes code before the master process is initialized"""
+    print("GUNICORN ON STARTING HOOOK")
+    os.system("python run_cli.py upgrade_db")
+
+
+
+print("LOADING gunnicorn.cfg.py")
+gunicorn_logger = logging.getLogger("gunicorn.error")
+gunicorn_logger.addHandler(logging.StreamHandler(sys.stdout))
+bind = "0.0.0.0:8080"