GHW for building and publishing docker images (#1391)

* add ghw and scripts for docker image deployment

* debug

* add permissions for content

* fix path to the bin folder

* add tags

* rename env

* fix path to docker file

* make polkadot-parachain executable

* fix typo

* fix more typos

* test

* revert back  use of  working directory

* mke bin executable in the artifacts folder

* use cd instead of working directory

* change path to cash

* fix path to cash

* change cache key

* delete old flows

* addressed PR comments

* fix path

* reorg docker files

docker/dockerfiles/polkadot/docker-compose.yml

@@ -0,0 +1,22 @@
+version: '3'
+services:
+  polkadot:
+    image: parity/polkadot:latest
+
+    ports:
+      - "127.0.0.1:30333:30333/tcp"
+      - "127.0.0.1:9933:9933/tcp"
+      - "127.0.0.1:9944:9944/tcp"
+      - "127.0.0.1:9615:9615/tcp"
+
+    volumes:
+      - "polkadot-data:/data"
+
+    command: |
+      --unsafe-rpc-external
+      --unsafe-ws-external
+      --rpc-cors all
+      --prometheus-external
+
+volumes:
+  polkadot-data: