diff --git a/scripts/entrypoint.sh b/scripts/entrypoint.sh
index a73f40136..ec62af83d 100755
--- a/scripts/entrypoint.sh
+++ b/scripts/entrypoint.sh
@@ -15,6 +15,10 @@ file_env() {
    if [ -n "$val_var" ]; then
       val="$val_var"
    elif [ -n "$val_fileVar" ]; then
+      if [ ! -r "$val_fileVar" ]; then
+         echo "error: file '$val_fileVar' does not exist or is not readable" >&2
+         exit 1
+      fi
       val="$(cat "$val_fileVar")"
    fi
 
diff --git a/scripts/entrypoint_test.sh b/scripts/entrypoint_test.sh
new file mode 100755
index 000000000..894638f2b
--- /dev/null
+++ b/scripts/entrypoint_test.sh
@@ -0,0 +1,131 @@
+#!/usr/bin/env sh
+
+# Test script for entrypoint.sh file_env function
+# Run: ./scripts/entrypoint_test.sh
+
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+TEMP_DIR=$(mktemp -d)
+trap "rm -rf $TEMP_DIR" EXIT
+
+# Colors for output
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+NC='\033[0m' # No Color
+
+pass_count=0
+fail_count=0
+
+pass() {
+    echo "${GREEN}PASS${NC}: $1"
+    pass_count=$((pass_count + 1))
+}
+
+fail() {
+    echo "${RED}FAIL${NC}: $1"
+    fail_count=$((fail_count + 1))
+}
+
+# Test 1: Direct env var works
+test_direct_env_var() {
+    unset MEMOS_DSN MEMOS_DSN_FILE
+    export MEMOS_DSN="direct_value"
+
+    result=$("$SCRIPT_DIR/entrypoint.sh" sh -c 'echo $MEMOS_DSN' 2>&1)
+    if [ "$result" = "direct_value" ]; then
+        pass "Direct env var works"
+    else
+        fail "Direct env var: expected 'direct_value', got '$result'"
+    fi
+    unset MEMOS_DSN
+}
+
+# Test 2: File env var works with readable file
+test_file_env_var_readable() {
+    unset MEMOS_DSN MEMOS_DSN_FILE
+    echo "file_value" > "$TEMP_DIR/dsn_file"
+    export MEMOS_DSN_FILE="$TEMP_DIR/dsn_file"
+
+    result=$("$SCRIPT_DIR/entrypoint.sh" sh -c 'echo $MEMOS_DSN' 2>&1)
+    if [ "$result" = "file_value" ]; then
+        pass "File env var with readable file works"
+    else
+        fail "File env var readable: expected 'file_value', got '$result'"
+    fi
+    unset MEMOS_DSN_FILE
+}
+
+# Test 3: Error when file doesn't exist
+test_file_env_var_missing() {
+    unset MEMOS_DSN MEMOS_DSN_FILE
+    export MEMOS_DSN_FILE="$TEMP_DIR/nonexistent_file"
+
+    if result=$("$SCRIPT_DIR/entrypoint.sh" sh -c 'echo $MEMOS_DSN' 2>&1); then
+        fail "Missing file should fail, but succeeded with: $result"
+    else
+        if echo "$result" | grep -q "does not exist or is not readable"; then
+            pass "Missing file returns error"
+        else
+            fail "Missing file error message unexpected: $result"
+        fi
+    fi
+    unset MEMOS_DSN_FILE
+}
+
+# Test 4: Error when file is not readable
+test_file_env_var_unreadable() {
+    unset MEMOS_DSN MEMOS_DSN_FILE
+    echo "secret" > "$TEMP_DIR/unreadable_file"
+    chmod 000 "$TEMP_DIR/unreadable_file"
+    export MEMOS_DSN_FILE="$TEMP_DIR/unreadable_file"
+
+    if result=$("$SCRIPT_DIR/entrypoint.sh" sh -c 'echo $MEMOS_DSN' 2>&1); then
+        fail "Unreadable file should fail, but succeeded with: $result"
+    else
+        if echo "$result" | grep -q "does not exist or is not readable"; then
+            pass "Unreadable file returns error"
+        else
+            fail "Unreadable file error message unexpected: $result"
+        fi
+    fi
+    chmod 644 "$TEMP_DIR/unreadable_file" 2>/dev/null || true
+    unset MEMOS_DSN_FILE
+}
+
+# Test 5: Error when both var and file are set
+test_both_set_error() {
+    unset MEMOS_DSN MEMOS_DSN_FILE
+    echo "file_value" > "$TEMP_DIR/dsn_file"
+    export MEMOS_DSN="direct_value"
+    export MEMOS_DSN_FILE="$TEMP_DIR/dsn_file"
+
+    if result=$("$SCRIPT_DIR/entrypoint.sh" sh -c 'echo $MEMOS_DSN' 2>&1); then
+        fail "Both set should fail, but succeeded with: $result"
+    else
+        if echo "$result" | grep -q "are set (but are exclusive)"; then
+            pass "Both var and file set returns error"
+        else
+            fail "Both set error message unexpected: $result"
+        fi
+    fi
+    unset MEMOS_DSN MEMOS_DSN_FILE
+}
+
+# Run all tests
+echo "Running entrypoint.sh tests..."
+echo "================================"
+
+test_direct_env_var
+test_file_env_var_readable
+test_file_env_var_missing
+test_file_env_var_unreadable
+test_both_set_error
+
+echo "================================"
+echo "Tests completed: ${GREEN}$pass_count passed${NC}, ${RED}$fail_count failed${NC}"
+
+if [ $fail_count -gt 0 ]; then
+    exit 1
+fi
+exit 0