first working version

.github/workflows/docker-hub.yml

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+name: Docker-Image-Dev
+on: 
+  push:
+    branches: [ main ]
+
+jobs:
+  push:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Login to DockerHub
+        uses: docker/login-action@v1 
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          # list of Docker images to use as base name for tags
+          images: |
+            ${{ github.repository }}
+          # generate Docker tags based on the following events/attributes
+          tags: |
+            type=raw,value=dev
+          # always generate latest tag on push
+
+      - name: Build and push to DockerHub
+        id: docker_build
+        uses: docker/build-push-action@v2
+        with:
+          push: true
+          tags: |
+            ${{ steps.meta.outputs.tags }}

.github/workflows/linting.yml

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+name: Linting
+on: [pull_request]
+
+jobs:
+  shellcheck:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Run Shellcheck
+        uses: azohra/shell-linter@latest
+        with:
+          severity: "error"
+  dockerlint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - uses: hadolint/hadolint-action@v2.0.0
+        with:
+          dockerfile: Dockerfile
+          lint: 'hadolint'
+          failure-threshold: error 
+  test-build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Build the Image
+        uses: docker/build-push-action@v2
+        with:
+          push: false

.github/workflows/release.yml

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+name: Release
+on: 
+  release:
+    types: [published]
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Login to DockerHub
+        uses: docker/login-action@v1 
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          # list of Docker images to use as base name for tags
+          images: |
+            ${{ github.repository }}
+          # generate Docker tags based on the following events/attributes
+          tags: |
+            type=semver,pattern=v{{version}}
+            type=semver,pattern=v{{major}}.{{minor}}
+            type=semver,pattern=v{{major}}
+          # always generate latest tag on push
+          flavor: |
+            latest=true
+      - name: Build and push to DockerHub & GitHub Packages
+        id: docker_build
+        uses: docker/build-push-action@v2
+        with:
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}