Fix shell syntax error in Dockerfile

.dockerignore

@@ -0,0 +1,5 @@
+venv/
+__pycache__/
+.git/
+.DS_Store
+*.pyc

Dockerfile

@@ -1,12 +1,9 @@
-# Use specific bookworm tag to ensure stability, or stick to slim
-# We will use the generic slim but fix the Java install
 FROM python:3.11-slim
 
 WORKDIR /app
 
 # 1. Install System Dependencies
-# Changed 'openjdk-17-jdk-headless' to 'default-jdk-headless'
-# This automatically picks the correct available Java version (likely 21)
+# default-jdk-headless ensures we get a compatible Java version (likely 17 or 21)
 RUN apt-get update && \
     apt-get install -y default-jdk-headless build-essential git && \
     rm -rf /var/lib/apt/lists/*
@@ -15,12 +12,12 @@ RUN apt-get update && \
 COPY . .
 
 # 3. Install Python libraries
-# --upgrade pip first to avoid wheel build issues
 RUN pip install --no-cache-dir --upgrade pip && \
     pip install --no-cache-dir -r requirements.txt
 
-# 4. Create User (Robust Check)
-RUN id -u user &>/dev/null || useradd -m -u 1000 user
+# 4. Create User (Fixed for 'dash' shell)
+# Changed '&>/dev/null' to '>/dev/null 2>&1' to match the system shell
+RUN id -u user >/dev/null 2>&1 || useradd -m -u 1000 user
 
 # 5. Fix Permissions
 RUN chown -R user:user /app && \