Update pipelines to work with newer ruby versions

Author: razzeee

.github/actions/middleman-build/Dockerfile

@@ -13,10 +13,16 @@ jobs:
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2
 
-    - name: Build
-      uses: ./.github/actions/middleman-build
+    - name: Setup ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        bundler-cache: true
+    - name: Install ruby dependencies
+      run: bundle install
+    - name: Bulid with middleman
+      run: middleman build
 
     - name: Deploy
       run: |

.github/actions/middleman-build/entrypoint.sh

@@ -7,10 +7,13 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - run: echo $GITHUB_TOKEN | docker login --username $GITHUB_ACTOR --password-stdin docker.pkg.github.com
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2
 
-    - name: Build
-      uses: ./.github/actions/middleman-build
+    - name: Setup ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        bundler-cache: true
+    - name: Install ruby dependencies
+      run: bundle install
+    - name: Bulid with middleman
+      run: middleman build

.github/workflows/deploy.yml

@@ -0,0 +1 @@
+2.6.5