implement gunicorn WSGI

entrypoint.sh

@@ -1,36 +1,48 @@
-#!/bin/bash
+#!/usr/bin/env sh
+set -e
 
-# Default to sqlite if not specified
-DB_TYPE="${DB_TYPE:-sqlite}"
+# Ensure Flask CLI finds your app
+export FLASK_APP=run.py
+export FLASK_ENV=production
 
-# Wait for PostgreSQL if needed
-if [ "$DB_TYPE" = "postgresql" ]; then
-  MAX_WAIT=180
-  WAIT_INTERVAL=2
-  WAITED=0
-  echo "Database type is PostgreSQL. Waiting for database to be ready..."
-  until pg_isready -h "$DB_HOST" -p "$DB_PORT" -U "$DB_USER" > /dev/null 2>&1; do
-    if [ $WAITED -ge $MAX_WAIT ]; then
-      echo "Timeout: Could not connect to the database at $DB_HOST:$DB_PORT within $MAX_WAIT seconds."
+# --- Migrations with simple retry (no pg_isready needed) ---
+if [ "${RUN_DB_MIGRATIONS:-1}" = "1" ]; then
+  ATTEMPTS="${MIGRATION_MAX_ATTEMPTS:-30}"      # ~90s default with 3s sleep
+  SLEEP_SECS="${MIGRATION_RETRY_SLEEP:-3}"
+  i=1
+  echo "Applying migrations (up to $ATTEMPTS attempts)..."
+  until flask db upgrade; do
+    if [ "$i" -ge "$ATTEMPTS" ]; then
+      echo "ERROR: Migrations failed after $ATTEMPTS attempts."
       exit 1
     fi
-    echo "Waiting for database at $DB_HOST:$DB_PORT... ($WAITED/$MAX_WAIT seconds)"
-    sleep $WAIT_INTERVAL
-    WAITED=$((WAITED + WAIT_INTERVAL))
+    echo "DB not ready yet; retrying in ${SLEEP_SECS}s ($i/$ATTEMPTS)…"
+    sleep "$SLEEP_SECS"
+    i=$((i+1))
   done
-  echo "Database is ready."
-else
-  echo "Database type is SQLite. Skipping PostgreSQL readiness check."
 fi
 
-# Apply migrations
-echo "Applying database migrations..."
-flask db upgrade
+# --- Start the image import worker exactly once per container ---
+if [ "${RUN_IMAGE_IMPORTER:-1}" = "1" ]; then
+  echo "Starting image import worker (background)…"
+  python image_import_worker.py &
+fi
 
-# Start periodic image import in background
-echo "import worker waiting for flag"
-python image_import_worker.py &
+# --- Start Gunicorn ---
+GUNICORN_BIND="${GUNICORN_BIND:-0.0.0.0:5000}"
+GUNICORN_WORKERS="${GUNICORN_WORKERS:-2}"
+GUNICORN_THREADS="${GUNICORN_THREADS:-4}"
+GUNICORN_TIMEOUT="${GUNICORN_TIMEOUT:-120}"
+GUNICORN_OPTS="${GUNICORN_OPTS:-}"
 
-# Start the Flask app
-echo "Starting Flask app..."
-exec flask run --host=0.0.0.0 --port=5000
+echo "Starting Gunicorn on ${GUNICORN_BIND} …"
+exec gunicorn \
+  --bind "${GUNICORN_BIND}" \
+  --workers "${GUNICORN_WORKERS}" \
+  --worker-class gthread \
+  --threads "${GUNICORN_THREADS}" \
+  --timeout "${GUNICORN_TIMEOUT}" \
+  --access-logfile - \
+  --error-logfile - \
+  ${GUNICORN_OPTS} \
+  run:app