README development improvements (#236)

README.md

@@ -30,7 +30,21 @@ In-depth docs are available [on the Terraform registry](https://registry.terrafo
 
 ## Development
 
-To do development you need Go installed, this repo cloned and that's about it. It has not been tested on Windows, so if you find problems let us know.
+If you do not have Go installed:
+
+1. Install Go `brew install golang`
+2. Make a Go development directory wherever you like `mkdir go_projects`
+3. Add the following config to your profile
+```
+export GOPATH=$HOME/../go_projects # edit with your go_projects dir
+export PATH=$PATH:$GOPATH/bin
+```
+4. Fork this repo and clone it into `go_projects`
+5. cd to `terraform-provider-snowflake` and install all the required packages with `make setup`
+6. Finally install goimports with `(cd && go get golang.org/x/tools/cmd/goimports)`.
+7. You should now be able to successfully run the tests with `make test`
+
+It has not been tested on Windows, so if you find problems let us know.
 
 If you want to build and test the provider locally there is a make target `make install-tf` that will build the provider binary and install it in a location that terraform can find.