fix: change Docker base image to node:18-slim and install openssl to resolve Prisma library compatibility

Dockerfile

@@ -1,4 +1,7 @@
-FROM node:18-alpine
+FROM node:18-slim
+
+# Install openssl for Prisma compatibility
+RUN apt-get update -y && apt-get install -y openssl && rm -rf /var/lib/apt/lists/*
 
 WORKDIR /app