Update action to do a remote image pull

Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.10
+FROM docker:19.03.10
 LABEL MAINTAINER = 'Friends of Go ([email protected])'
 WORKDIR /github/workspace
 COPY entrypoint.sh /entrypoint.sh

action.yml

@@ -5,15 +5,18 @@ branding:
   color: blue
   icon: play
 inputs:
-  who-to-greet:  # id of input
-    description: 'Who to greet'
+  hostAddress:
+    description: 'Deployment host address'
+    required: true
+  caCert:
+    description: 'CA certificate'
+    required: true
+  serverCert:
+    description: 'Server certificate'
+    required: true
+  serverKey:
+    description: 'Server key'
     required: true
-    default: 'World'
-outputs:
-  time: # id of output
-    description: 'The time we greeted you'
 runs:
   using: 'docker'
-  image: 'Dockerfile'
-  args:
-    - ${{ inputs.who-to-greet }}
+  image: 'Dockerfile'

entrypoint.sh

@@ -1,4 +1,4 @@
 #!/bin/sh -l
 
-echo "Hello $1, we gonna list your files..."
-echo "$(ls -1 | tr '\n' ' ')"
+# Pulls alpine:latest Docker image (remotely)
+docker -H $INPUT_HOST_ADDRESS --tls --tlscacert=$INPUT_CA_CERT --tlscert=$INPUT_SERVER_CERT --tlskey=$INPUT_SERVER_KEY pull alpine:latest