added issue template for reporting build errors

Author: justadudewhohacks

ISSUE_TEMPLATE.md

@@ -0,0 +1,65 @@
+<!--
+
+IMPORTANT! Please read the issue template carefully before creating a new issue.
+
+-->
+
+<!--
+
+If you are issue is not related to installing opencv4nodejs, go ahead deleting the following sections and describe your issue.
+
+-->
+
+# Error Message
+
+<!--
+
+If you are facing issues installing opencv4nodejs, please scroll through the terminal output of the build script and find the error message, causing the build to fail. Copy and paste the error message from your terminal into this section.
+
+IMPORTANT! The following error summary messages do not help, please do not upload them here!
+
+error code ELIFECYCLE
+error errno 1
+error <pkg> install: `node ./install.js`
+error Exit status 1
+error Failed at the <pkg> install script.
+error This is probably not a problem with npm. There is likely additional logging output above.
+verbose exit [ 1, true ]
+
+npm ERR! code ELIFECYCLE
+npm ERR! errno 1
+npm ERR! <pkg> install: node-gyp rebuild
+npm ERR! Exit status 1
+npm ERR!
+npm ERR! Failed at the <pkg> install script.
+npm ERR! This is probably not a problem with npm. There is likely additional log
+
+-->
+
+# Auto Build - Full Error Log
+
+<!--
+
+If you are using the auto build feature (you did not explicitly set the OPENCV4NODEJS_DISABLE_AUTOBUILD flag) please copy and paste the full output of the build script from your terminal into a .txt file and upload the file here.
+
+If you do not use the auto build feature, delete this section.
+
+IMPORTANT! Do NOT upload any npm-debug.log files here, as they do not capture the required build error information. Build errors are thrown by the gyp process and not by npm.
+
+-->
+
+# Manual Build - Environment Information
+
+<!--
+
+If you not are using the auto build feature (you did explicitly set the OPENCV4NODEJS_DISABLE_AUTOBUILD flag) please fill in the following information.
+
+If you are using the auto build feature, delete this section.
+
+-->
+
+*OpenCV version* (example 3.4.1): ?.?.?
+
+*With OpenCV-contrib?* (extra modules): yes/no?
+
+*OS*: Windows 7 / 8 / 10? / MacOSX? / Ubuntu? ...