Quote version numbers

Author: SuperSandro2000

.github/workflows/docker.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        version: [ 0.18, 0.17, 0.16, 0.15, 0.14 ]
+        version: [ "0.18", "0.17", "0.16", "0.15", "0.14" ]
     steps:
       - name: Checkout
         uses: actions/checkout@v2
@@ -32,7 +32,7 @@ jobs:
           DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}
           DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
           EXTRA_TAG: stable
-          VERSION_SHORT: 1.0
+          VERSION_SHORT: "1.0"
         run: |
           ./build.sh $VERSION_SHORT
 
@@ -46,6 +46,6 @@ jobs:
           DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}
           DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
           EXTRA_TAG: latest
-          VERSION_SHORT: 1.1
+          VERSION_SHORT: "1.1"
         run: |
           ./build.sh $VERSION_SHORT