Prebuild Action Docker image and host on ghcr.io (#1)

Dockerfile

@@ -1,9 +1,12 @@
 FROM python:3.8.18-slim-bullseye AS builder
+
+LABEL org.opencontainers.image.source=https://github.com/Atom-Learning/bigquery-upload-action
+LABEL org.opencontainers.image.description="This Github action can be used to upload samples to BigQuery table."
+LABEL org.opencontainers.image.licenses=MIT
+
 ADD . /app
 WORKDIR /app
 
-RUN apt-get update
-RUN apt-get install -y g++
 # We are installing a dependency here directly into our app source dir
 RUN pip install --target=/app -r plugin_scripts/requirements.lock
 ENV PYTHONPATH /app

action.yml

@@ -23,4 +23,4 @@ inputs:
     required: true
 runs:
   using: 'docker'
-  image: 'Dockerfile'
+  image: 'docker://ghcr.io/atom-learning/bigquery-upload-action:v0.5.1'