Add workflow, link checker and modify Readme (#30)

* Add test workflow for dockerfile build
* Add link checker workflow
* Modify Readme to divide input for build strategies

Signed-off-by: divyansh42 <diagrawa@redhat.com>

.github/workflows/dockerfile_build.yml

@@ -0,0 +1,45 @@
+# This workflow will perform a test whenever there
+# is some change in code done to ensure that the changes
+# are not buggy and we are getting the desired output.
+name: Build from dockerfile
+on: [push, pull_request, workflow_dispatch]
+env:
+  IMAGE_NAME: "hello-world"
+
+jobs:
+  build:
+    name: Build image using Buildah
+    runs-on: ubuntu-20.04
+    steps:
+
+      # Checkout buildah action github repository
+      - name: Checkout Buildah action
+        uses: actions/checkout@v2
+        with:
+          path: "buildah-build"
+
+      - name: Create Dockerfile
+        run: |
+          cat > Dockerfile<<EOF
+          FROM busybox
+          RUN echo "hello world"
+          EOF
+
+      # Build image using Buildah action
+      - name: Build Image
+        id: build_image
+        uses: ./buildah-build/
+        with:
+          image: ${{ env.IMAGE_NAME }}
+          tags: 'latest ${{ github.sha }}'
+          dockerfiles: |
+            ./Dockerfile
+      
+      - name: Echo Outputs
+        run: | 
+          echo "Image: ${{ steps.build_image.outputs.image }}"
+          echo "Tags: ${{ steps.build_image.outputs.tags }}"
+
+      # Check if image is build
+      - name: Check images created
+        run: buildah images | grep '${{ env.IMAGE_NAME }}'

.github/workflows/link_check.yml

@@ -0,0 +1,18 @@
+name: Link checker
+on:
+  push:
+    paths:
+      - '**.md'
+  pull_request:
+    paths:
+      -'**.md'
+
+jobs:
+  markdown-link-check:
+    name: Check links in markdown
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+      - uses: gaurav-nelson/github-action-markdown-link-check@v1
+        with:
+          use-verbose-mode: true

.github/workflows/scratch_build.yml

@@ -1,7 +1,7 @@
 # This workflow will perform a test whenever there
 # is some change in code done to ensure that the changes
 # are not buggy and we are getting the desired output.
-name: Test Build
+name: Build
 on: [push, pull_request, workflow_dispatch]
 env:
   PROJECT_DIR: spring-petclinic
@@ -11,7 +11,7 @@ env:
 jobs:
   build:
     name: Build image using Buildah
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
 
       # Checkout buildah action github repository