fix(code-server): handle when the extension folder does not exist yet (#278)

code-server/run.sh

@@ -10,6 +10,7 @@ CODE_SERVER="${INSTALL_PREFIX}/bin/code-server"
 EXTENSION_ARG=""
 if [ -n "${EXTENSIONS_DIR}" ]; then
   EXTENSION_ARG="--extensions-dir=${EXTENSIONS_DIR}"
+  mkdir -p "${EXTENSIONS_DIR}"
 fi
 
 function run_code_server() {