Add a Hello World action

.github/actions/hello-world/Dockerfile

@@ -0,0 +1,6 @@
+FROM golang:1.15
+WORKDIR /go/src/hello
+COPY . .
+RUN go get -d -v ./...
+RUN go install -v ./...
+CMD ["hello"]

.github/actions/hello-world/action.yml

@@ -0,0 +1,22 @@
+name: "my hello action"
+
+description: "say hello with GitHub Actions"
+
+inputs:
+  firstGreeting:
+    description: "who would you like to greet in the console"
+    required: true
+    default: "Hubot"
+
+  secondGreeting:
+    description: "another person to greet"
+    required: true
+    default: "Mona the Octocat"
+
+  thirdGreeting:
+    description: "a third greeting"
+    required: false
+
+runs:
+  using: "docker"
+  image: "Dockerfile"

.github/actions/hello-world/main.go

@@ -0,0 +1,24 @@
+package main
+
+import (
+    "fmt"
+    "os"
+)
+
+func main() {
+
+// Access Inputs as environment vars
+firstGreeting := os.Getenv("INPUT_FIRSTGREETING")
+secondGreeting := os.Getenv("INPUT_SECONDGREETING")
+thirdGreeting := os.Getenv("INPUT_THIRDGREETING")
+
+// Use those inputs in the actions logic
+fmt.Println("Hello " + firstGreeting)
+fmt.Println("Hello " + secondGreeting)
+
+// Someimes inputs are not "required" and we can build around that
+if thirdGreeting != "" {
+    fmt.Println("Hello " + thirdGreeting)
+    }
+
+}

.github/workflows/my-workflow.yml

@@ -1,13 +1,14 @@
-name: Docker Actions
+name: "Docker Actions"
 
 on: [push]
 
 jobs:
   action:
-    runs-on: ubuntu-latest
-
+    runs-on: "ubuntu-latest"
     steps:
       - uses: actions/checkout@v1
 
-      - name: hello-action
+      - name: "hello-action"
         uses: ./.github/actions/hello-world
+        with:
+          firstGreeting: "Learning Lab User"