setup docker run action

.gitignore

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+.idea

Dockerfile

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+FROM docker:19.03
+
+COPY entrypoint.sh /entrypoint.sh
+
+ENTRYPOINT ["/entrypoint.sh"]

README.md

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+# Docker Run Action
+
+This action targets a very specific use-case that is not currently supported by Github Workflows. This action gives you the capability to run built containers.
+
+Docker already supports running commands inside a docker image. See [jobs.<jobs_id>.container](https://help.github.com/en/actions/reference/workflow-syntax-for-github-actions#jobsjob_idcontainer). But it doesn't give you a clean way to run an image from a private repo or an image built on a previous step.
+
+### Example Usage
+
+#### Standard use-case
+```yaml
+- uses: addnab/docker-run-action@v1
+  with:
+    image: docker:latest
+    command: echo "hello world"
+```
+
+### Supported Inputs
+```yaml
+  image:
+    description: 'Image'
+    required: true
+  options:
+    description: 'Options'
+    required: false
+  command:
+    description: 'Command'
+    required: false
+  args:
+    description: 'Args'
+    required: false
+  registry:
+    description: 'Registry'
+    required: false
+  username:
+    description: 'Username'
+    required: false
+  password:
+    description: 'Password'
+    required: false
+```

action.yml

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+# action.yml
+name: 'Docker Run Action'
+description: 'Run a command in a new container'
+inputs:
+  image:
+    description: 'Image'
+    required: true
+  options:
+    description: 'Options'
+    required: false
+  command:
+    description: 'Command'
+    required: false
+  args:
+    description: 'Args'
+    required: false
+  registry:
+    description: 'Registry'
+    required: false
+  username:
+    description: 'Username'
+    required: false
+  password:
+    description: 'Password'
+    required: false
+runs:
+  using: 'docker'
+  image: 'Dockerfile'

entrypoint.sh

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+#!/usr/bin/env bash
+
+if [ ! -z $INPUT_USERNAME ];
+then echo $INPUT_USERNAME | docker login $INPUT_REGISTRY -u $INPUT_PASSWORD --password-stdin
+fi
+
+exec docker run $INPUT_OPTIONS $INPUT_IMAGE $INPUT_COMMAND $INPUT_ARGS