chore: add delay for docker tools, doc updates (#80)

Added slight delay in tools for docker commands to avoid a harmless but unnecessary error message.
Corrected codecov badge in README.
Stated a new file CONTRIBUTING.md with development specific notes.

CONTRIBUTING.md

@@ -0,0 +1,16 @@
+# Guidelines For Contributing
+
+### Updating the code generator
+
+The ["openapi-generator"](https://github.com/OpenAPITools/openapi-generator/) repository contains the code generator for Julia. For any changes that also need updates to the generated code, a PR needs to be made to the `openapi-generator` repo. Relevant files:
+- <https://github.com/OpenAPITools/openapi-generator/blob/master/.github/workflows/samples-julia.yaml>
+- <https://github.com/OpenAPITools/openapi-generator/tree/master/bin/configs/julia-client-petstore-new.yaml>
+- <https://github.com/OpenAPITools/openapi-generator/tree/master/bin/configs/julia-server-petstore-new.yaml>
+- <https://github.com/OpenAPITools/openapi-generator/tree/master/samples/client/petstore/julia>
+- <https://github.com/OpenAPITools/openapi-generator/tree/master/samples/server/petstore/julia>
+- <https://github.com/OpenAPITools/openapi-generator/blob/master/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractJuliaCodegen.java>
+- <https://github.com/OpenAPITools/openapi-generator/blob/master/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/JuliaServerCodegen.java>
+- <https://github.com/OpenAPITools/openapi-generator/blob/master/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/JuliaClientCodegen.java>
+- <https://github.com/OpenAPITools/openapi-generator/tree/master/modules/openapi-generator/src/main/resources/julia-client>
+- <https://github.com/OpenAPITools/openapi-generator/tree/master/modules/openapi-generator/src/main/resources/julia-server>
+

README.md

@@ -1,7 +1,7 @@
 # OpenAPI
 
 [![Build Status](https://github.com/JuliaComputing/OpenAPI.jl/workflows/CI/badge.svg)](https://github.com/JuliaComputing/OpenAPI.jl/actions?query=workflow%3ACI+branch%3Amain)
-[![codecov.io](http://codecov.io/github/JuliaComputing/OpenAPI.jl/coverage.svg?branch=main)](http://codecov.io/github/JuliaComputing/OpenAPI.jl?branch=main)
+[![codecov](https://codecov.io/gh/JuliaComputing/OpenAPI.jl/branch/main/graph/badge.svg?token=iZeFL7Js0l)](https://codecov.io/gh/JuliaComputing/OpenAPI.jl)
 
 This is the Julia library needed along with code generated by the [OpenAPI generator](https://openapi-generator.tech/) to help define, produce and consume OpenAPI interfaces.
 

src/tools.jl

@@ -45,6 +45,7 @@ function _stop_docker(image_name::AbstractString, image_type::AbstractString; us
             return false
         end
 
+        sleep(5)
         container_id = strip(String(read(find_cmd)))
         if !isempty(container_id)
             rm_cmd = `$docker rm $container_id`