update issue template

.github/ISSUE_TEMPLATE/bug_report.md

@@ -4,25 +4,16 @@ about: Create a bug report to help us improve
 title: ''
 labels: bug
 assignees: ''
-
 ---
 
 <!-- Please answer these questions when reporting a bug. Thanks! -->
 
-### What version of iotex-core are you using (`ioctl version`)?
-
-
+### What version of iotex-core image (or code branch) are you using?
 
 ### What operating system and processor architecture are you using?
 
-
-
 ### What did you do? If possible, provide a recipe for reproducing the error.
 
-
-
 ### What did you expect to see?
 
-
-
 ### What did you see instead?

.github/ISSUE_TEMPLATE/enhancement.md

@@ -4,11 +4,18 @@ about: Suggest an enhancement to iotex-core project
 title: ''
 labels: enhancement
 assignees: ''
-
 ---
 
 <!-- Please only use this template for submitting enhancement requests -->
 
-**What would you like to be added**:
+### What would you like to be added
+
+### Why is this needed
+
+### How important you think this is for IoTeX
+- [] must have
+- [] should have
+- [] nice to have
 
-**Why is this needed**:
+### Additional information
+Let us know any background or context that would help us better understand the request (for example the particular use-case that prompted this request)

.github/ISSUE_TEMPLATE/feature.md

@@ -0,0 +1,38 @@
+---
+name: Feature Request
+about: New feature request to iotex-core project
+title: ''
+labels: feature
+assignees: ''
+---
+
+<!-- Please only use this template for submitting feature requests -->
+
+### Description of new feature request
+
+### Is this a hard-fork (and height to be activated)
+- [] Yes
+- Name of activation height:
+
+### Implementation plan
+- [] Phase 1 description (PR number)
+- [] Phase 2 description (PR number)
+- [] Phase 3 description (PR number)
+
+### Affected modules
+- [] action
+- [] actpool
+- [] api
+- [] blockchain
+- [] blockindex
+- [] blocksync
+- [] chainservice
+- [] config
+- [] consensus
+- [] db
+- [] dispatcher
+- [] ioctl
+- [] p2p
+- [] server
+- [] state
+- [] tools

.github/ISSUE_TEMPLATE/refactor.md

@@ -0,0 +1,21 @@
+---
+name: Code refactor
+about: File a code refactor task
+title: ''
+labels: refactor
+assignees: ''
+---
+
+<!-- Please only use this template for submitting reports about failing tests in iotex-core CI jobs -->
+
+### Description of the code refactor
+
+### Why is this needed
+- [] better/less memory usage
+- [] reduce running time
+- [] clean (easy-to-understand) data structure or algorithm
+- [] remove dead code
+- [] better code design or structure (like reduce complexity)
+- [] reduce/decouple dependencies between code modules
+- [] increase test coverage
+- [] better code readability

.gitignore

@@ -13,6 +13,7 @@
 pprof*
 
 # Binaries for programs and plugins
+*.a
 *.exe
 *.dll
 *.dylib
@@ -34,8 +35,8 @@ data/*
 
 # binary
 bin/*
-**/release
+*/release
 coverage.txt
-lint.log
+*.log
 .editorconfig