chore: use python image 3.13-slim instead of 3.13-alpine

Dockerfile

@@ -1,9 +1,10 @@
 # Multi-stage build to create a minimal image
-FROM python:3.13-alpine AS builder
+FROM python:3.13-slim AS builder
 
 # Create working directory
 WORKDIR /app
 
+# poetry export -f requirements.txt --output requirements.txt --without-hashes
 # Copy dependency files
 COPY requirements.txt ./
 
@@ -11,10 +12,7 @@ COPY requirements.txt ./
 RUN pip install --no-cache-dir --no-deps --disable-pip-version-check --target=/app/site-packages -r requirements.txt
 
 # Use Alpine as the base image for a much smaller footprint
-FROM python:3.13-alpine
-
-# Install ca-certificates for SSL/HTTPS support and tzdata for timezone support
-RUN apk add --no-cache ca-certificates tzdata
+FROM python:3.13-slim
 
 # Copy installed packages from builder stage
 COPY --from=builder /app/site-packages /app/site-packages
@@ -30,7 +28,7 @@ ENV PYTHONPATH=/app/site-packages
 WORKDIR /app
 
 # Create a non-root user for security
-RUN adduser -D -u 1000 myice
+RUN useradd --home-dir /app --no-create-home --uid 1000 myice
 USER myice
 
 # Expose port