Add formatting check for shell scripts (#106)

.sample/run.sh

@@ -1,7 +1,15 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
+# Convert templated variables to shell variables
+# shellcheck disable=SC2269
+LOG_PATH=${LOG_PATH}
+
+# shellcheck disable=SC2034
 BOLD='\033[0;1m'
+
+# shellcheck disable=SC2059
 printf "$${BOLD}Installing MODULE_NAME ...\n\n"
+
 # Add code here
 # Use varibles from the templatefile function in main.tf
 # e.g. LOG_PATH, PORT, etc.
@@ -13,6 +21,6 @@ printf "👷 Starting MODULE_NAME in background...\n\n"
 # 1. Use & to run it in background
 # 2. redirct stdout and stderr to log files
 
-./app >${LOG_PATH} 2>&1 &
+./app > "$${LOG_PATH}" 2>&1 &
 
-printf "check logs at ${LOG_PATH} \n\n"
+printf "check logs at %s\n\n" "$${LOG_PATH}"