Add GitHub Actions CI rules (#70)

* Prepare Dockerfile for GitHub Actions

* Add Action

* Add CI rules

* Move docker files into the docker directory to prevent fetching build artifacts

* Cache Docker layers

Co-authored-by: aanper <mail@s3f.ru>

.github/actions/docker/action.yml

@@ -0,0 +1,11 @@
+name: 'Run in docker'
+inputs:
+  run:  # id of input
+    description: 'A command to run'
+    required: true
+    default: ''
+runs:
+  using: 'docker'
+  image: '../../../docker/Dockerfile'
+  args:
+    - ${{ inputs.run }}