Update Dockerfile

Dockerfile

@@ -7,12 +7,16 @@ WORKDIR /app
 # Copy the current directory contents into the container at /app
 COPY . /app
 
-# Define the user ID in the environment variable USER_ID
-ARG USER_ID
+# Define the user ID in the environment variable USER_ID with a default value
+ARG USER_ID=1000
 ENV USER_ID=$USER_ID
 
 # Check if the user already exists
-RUN if id "$USER_ID" >/dev/null 2>&1; then \
+RUN if [ -z "$USER_ID" ]; then \
+      echo "User ID not provided. Using the default user ID 1000."; \
+      USER_ID=1000; \
+    fi && \
+    if id "$USER_ID" >/dev/null 2>&1; then \
       echo "User with ID $USER_ID already exists."; \
     else \
       useradd -m -u "$USER_ID" user; \