Update entrypoint.sh to support PostgreSQL

- Auto-detect database type from DATABASE_URL
- Use pg_isready for PostgreSQL health check
- Use mysqladmin ping for MariaDB/MySQL
- Default to postgres if not specified

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

docker/entrypoint.sh

@@ -12,24 +12,37 @@ echo -e "${GREEN}KeepItGoing Docker Entrypoint${NC}"
 echo -e "${GREEN}========================================${NC}"
 
 # Extract database host from DATABASE_URL or use DB_HOST env var
-DB_HOST=${DB_HOST:-mariadb}
+DB_HOST=${DB_HOST:-postgres}
 
-# Wait for MariaDB to be ready
-echo -e "${YELLOW}Waiting for MariaDB at ${DB_HOST}...${NC}"
+# Detect database type from DATABASE_URL
+if echo "$DATABASE_URL" | grep -q "mysql\|mariadb"; then
+    DB_TYPE="mysql"
+    DB_CHECK_CMD="mysqladmin ping -h${DB_HOST} --silent"
+elif echo "$DATABASE_URL" | grep -q "postgres"; then
+    DB_TYPE="postgres"
+    DB_CHECK_CMD="pg_isready -h ${DB_HOST} -U ${DB_USER:-keepitgoing}"
+else
+    # Default to postgres
+    DB_TYPE="postgres"
+    DB_CHECK_CMD="pg_isready -h ${DB_HOST} -U ${DB_USER:-keepitgoing}"
+fi
+
+# Wait for database to be ready
+echo -e "${YELLOW}Waiting for database at ${DB_HOST}...${NC}"
 max_attempts=30
 attempt=0
 
-while ! mysqladmin ping -h"${DB_HOST}" --silent 2>/dev/null; do
+while ! eval $DB_CHECK_CMD 2>/dev/null; do
     attempt=$((attempt + 1))
     if [ $attempt -eq $max_attempts ]; then
-        echo -e "${RED}ERROR: MariaDB did not become available in time${NC}"
+        echo -e "${RED}ERROR: Database did not become available in time${NC}"
         exit 1
     fi
-    echo "Waiting for MariaDB... ($attempt/$max_attempts)"
+    echo "Waiting for database... ($attempt/$max_attempts)"
     sleep 2
 done
 
-echo -e "${GREEN}✓ MariaDB is ready!${NC}"
+echo -e "${GREEN}✓ Database is ready!${NC}"
 
 # Function to run migrations
 run_migrations() {