doc: adding more documentation for process

Adding more documentations for the process
to follow.

Signed-off-by: Madhu Rajanna <[email protected]>

LICENSE

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+
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+      with Licensor regarding such Contributions.
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+      whether in tort (including negligence), contract, or otherwise,
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PendingReleaseNotes.md

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+# v0.0.1 Pending Release Notes
+
+## Breaking Changes
+
+## Features
+
+## NOTE

docs/DCO

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+Developer Certificate of Origin
+Version 1.1
+
+Copyright (C) 2004, 2006 The Linux Foundation and its contributors.
+660 York Street, Suite 102,
+San Francisco, CA 94110 USA
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+
+Developer's Certificate of Origin 1.1
+
+By making a contribution to this project, I certify that:
+
+(a) The contribution was created in whole or in part by me and I
+    have the right to submit it under the open source license
+    indicated in the file; or
+
+(b) The contribution is based upon previous work that, to the best
+    of my knowledge, is covered under an appropriate open source
+    license and I have the right under that license to submit that
+    work with modifications, whether created in whole or in part
+    by me, under the same open source license (unless I am
+    permitted to submit under a different license), as indicated
+    in the file; or
+
+(c) The contribution was provided directly to me by some other
+    person who certified (a), (b) or (c) and I have not modified
+    it.
+
+(d) I understand and agree that this project and the contribution
+    are public and that a record of the contribution (including all
+    personal information I submit with it, including my sign-off) is
+    maintained indefinitely and may be redistributed consistent with
+    this project or the open source license(s) involved.

docs/coding.md

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+# Coding Conventions
+
+Please follow coding conventions and guidelines described in the following documents:
+
+* [Go proverbs](https://go-proverbs.github.io/) - highly recommended read
+* [CodeReviewComments](https://github.com/golang/go/wiki/CodeReviewComments)
+* [Effective Go](https://golang.org/doc/effective_go.html)
+* [How to Write a Git Commit Message](https://chris.beams.io/posts/git-commit/)
+
+Here's a list of some more specific conventions that are often followed in
+the code and will be pointed out in the review process:
+
+## General
+
+* Keep variable names short for variables that are local to the function.
+* Do not export a function or variable name outside the package until you
+  have an external consumer for it.
+
+### Imports
+
+We use the following convention for specifying imports:
+
+```
+<import standard library packages>
+
+<import ceph-csi-operator packages>
+
+<import third-party packages>
+```
+
+Example:
+
+```go
+import (
+ "os"
+ "path"
+ "strings"
+ "time"
+
+ "github.com/ceph/ceph-csi-operator/util"
+
+ "github.com/pborman/uuid"
+)
+```
+
+### Error Handling
+
+* Use variable name `err` to denote error variable during a function call.
+* localize error vars to the deepest scope possible, this allows to reuse the
+  err var name and have a different memory location for each. For example, do
+  not use `errWrite` or `errRead`.
+* Do not panic() for errors that can be bubbled up back to user. Use panic() in
+  higher function only for fatal errors which shouldn't occur.
+* Do not ignore errors using `_` variable unless you know what you're doing.
+* Error strings should not start with a capital letter.
+* If error requires passing of extra information, you can define a new type
+* Error types should end with `Error`. Reuse existing error types as much as
+  possible.
+
+### Logging
+
+* Utility functions should never log. Logging must almost always
+  be done by the caller on receiving an `error`.
+* Always use log level `DEBUG` to provide useful **diagnostic information** to
+  developers or sysadmins.
+* Use log level `INFO` to provide information to users or sysadmins. This is the
+  kind of information you'd like to log in an out-of-the-box configuration in
+  happy scenario.
+* Use log level `WARN` when something fails but there's a workaround or fallback
+  or retry for it and/or is fully recoverable.
+* Use log level `ERROR` when something occurs which is fatal to the operation,
+  but not to the service or application.
+
+### Wrap long lines
+
+At present, we restrict the number of chars in a line to `120` which is the
+default value for the `lll` linter check we have in CI. If your source code line
+or comment goes beyond this limit please try to organize it in such a way it
+is within the line length limit and help on code reading.
+
+### Mark Down Rules
+
+* MD014 - Dollar signs used before commands without showing output
+
+  The dollar signs are unnecessary, it is easier to copy and paste and
+  less noisy if the dollar signs are omitted. Especially when the
+  command doesn't list the output, but if the command follows output
+  we can use '$ ' (dollar+space) mainly to differentiate between
+  command and its output.
+
+  scenario 1: when command doesn't follow output
+
+  ```console
+  cd ~/work
+  ```
+
+  scenario 2: when command follow output (use dollar+space)
+
+  ```console
+  $ ls ~/work
+  file1 file2 dir1 dir2 ...
+  ```