Update install.sh

Author: p1ratrulezzz

install.sh

@@ -1,5 +1,7 @@
 #!/bin/sh
 
+cd $(dirname $0)
+
 BASEDIR=$(dirname $(dirname $(dirname $(pwd))))
 VENDOR_DIR=$(basename $(dirname $(dirname $(pwd))))
 DIRNAME=mtproto-proxy
@@ -9,3 +11,5 @@ CD=$(pwd -P)
 cd "${BASEDIR}"
 mv "${CD}/${FILES_DIR}" "${BASEDIR}/"
 mv "$VENDOR_DIR" "${BASEDIR}/${DIRNAME}"
+rm -f "composer.json"
+rm -f "composer.lock"