diff --git a/docker-entrypoint.sh b/docker-entrypoint.sh
index d5d6947..985e62a 100644
--- a/docker-entrypoint.sh
+++ b/docker-entrypoint.sh
@@ -1,6 +1,34 @@
 #!/bin/sh
 set -e
 
+file_env() {
+  local var_name="$1"
+  local file_var_name="$2"
+
+  var_value=$(printenv "$var_name") || var_value=""
+  file_path=$(printenv "$file_var_name") || file_path=""
+
+  if [ -z "$var_value" ] && [ -z "$file_path" ]; then
+    echo "error: expected $var_name or $file_var_name env vars to be set"
+    exit 1
+
+  elif [ -n "$var_value" ] && [ -n "$file_path" ]; then
+    echo "both and $var_name $file_var_name env vars are set, expected only one of them"
+    exit 1
+
+  else
+    if [ -n $file_path ]; then
+      if [ -f "$file_path" ]; then
+        file_content=$(cat "$file_path")
+        export "$var_name=$file_content"
+      else
+        echo "error: file '$file_path' does not exist"
+        exit 1
+      fi
+    fi
+  fi
+}
+
 USERNAME=telegram-bot-api
 GROUPNAME=telegram-bot-api
 
@@ -10,6 +38,9 @@ if [ -n "${1}" ]; then
   exec "${*}"
 fi
 
+file_env "TELEGRAM_API_ID" "TELEGRAM_API_ID_FILE"
+file_env "TELEGRAM_API_HASH" "TELEGRAM_API_HASH_FILE"
+
 DEFAULT_ARGS="--http-port 8081 --dir=${TELEGRAM_WORK_DIR} --temp-dir=${TELEGRAM_TEMP_DIR} --username=${USERNAME} --groupname=${GROUPNAME}"
 CUSTOM_ARGS=""
 
@@ -43,37 +74,7 @@ fi
 
 COMMAND="telegram-bot-api ${DEFAULT_ARGS}${CUSTOM_ARGS}"
 
-file_env() {
-  local var_name="$1"
-  local file_var_name="$2"
-
-  var_value=$(printenv "$var_name") || var_value=""
-  file_path=$(printenv "$file_var_name") || file_path=""
-
-  if [ -z "$var_value" ] && [ -z "$file_path" ]; then
-    echo "error: expected $var_name or $file_var_name env vars to be set"
-    exit 1
-
-  elif [ -n "$var_value" ] && [ -n "$file_path" ]; then
-    echo "both and $var_name $file_var_name env vars are set, expected only one of them"
-    exit 1
-
-  else
-    if [ -n $file_path ]; then
-      if [ -f "$file_path" ]; then
-        file_content=$(cat "$file_path")
-        export "$var_name=$file_content"
-      else
-        echo "error: file '$file_path' does not exist"
-        exit 1
-      fi
-    fi
-  fi
-}
-
-file_env "TELEGRAM_API_ID" "TELEGRAM_API_ID_FILE"
-file_env "TELEGRAM_API_HASH" "TELEGRAM_API_HASH_FILE"
-
 echo "$COMMAND"
+
 # shellcheck disable=SC2086
 exec $COMMAND