diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 4ff8e8e..31df4ba 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -68,9 +68,6 @@ jobs:
         with:
           fetch-depth: 1
 
-      - name: Generate version value
-        run: echo "::set-env name=APP_VERSION::${GITHUB_REF##*/}@`echo ${GITHUB_SHA} | cut -c1-8`"
-
       - name: Generate image tag value
         run: echo "::set-env name=IMAGE_TAG::${GITHUB_REF##*/[vV]}" # `/refs/tags/v1.2.3` -> `1.2.3`
 
@@ -78,10 +75,10 @@ jobs:
         run: echo "${{ secrets.DOCKER_PASSWORD }}" | docker login -u "${{ secrets.DOCKER_LOGIN }}" --password-stdin &> /dev/null
 
       - name: Build image
-        run: docker build --build-arg "APP_VERSION=${APP_VERSION}" --tag "tarampampam/tinifier:${IMAGE_TAG}" --tag "tarampampam/tinifier:latest" -f ./Dockerfile .
+        run: docker build --tag "tarampampam/error-pages:${IMAGE_TAG}" --tag "tarampampam/error-pages:latest" -f ./Dockerfile .
 
       - name: Push version image
-        run: docker push "tarampampam/tinifier:${IMAGE_TAG}"
+        run: docker push "tarampampam/error-pages:${IMAGE_TAG}"
 
       - name: Push latest image
-        run: docker push "tarampampam/tinifier:latest"
+        run: docker push "tarampampam/error-pages:latest"
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 6616f10..9bcef7b 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -36,11 +36,17 @@ jobs: # Docs: <https://git.io/JvxXE>
         run: test -f ./out/ghost/404.html
 
   docker-build:
-    name: Try to run generator
+    name: Build docker image
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
         uses: actions/checkout@v2
 
       - name: Build docker image
-        run: docker build -f ./Dockerfile .
+        run: docker build -f ./Dockerfile --tag image:local .
+
+      - name: Run docker image
+        run: docker run --rm -d -p "8080:8080" -e "TEMPLATE_NAME=ghost") image:local
+
+      - name: Send HTTP request
+        run: curl -sS --fail "http://127.0.0.1:8080/500.html"
diff --git a/README.md b/README.md
index da9864f..8f758ef 100644
--- a/README.md
+++ b/README.md
@@ -41,6 +41,8 @@ Default configuration can be found in [`configuration.json`](./configuration.jso
 
 ### Docker
 
+[![Image size][badge_size_latest]][link_docker_build]
+
 Start image (`nginx` inside):
 
 ```bash
@@ -83,6 +85,7 @@ This is open-sourced software licensed under the [MIT License][link_license].
 [badge_issues]:https://img.shields.io/github/issues/tarampampam/error-pages-docker.svg?style=flat-square&maxAge=180
 [badge_pulls]:https://img.shields.io/github/issues-pr/tarampampam/error-pages-docker.svg?style=flat-square&maxAge=180
 [badge_license]:https://img.shields.io/github/license/tarampampam/error-pages-docker.svg?longCache=true
+[badge_size_latest]:https://img.shields.io/docker/image-size/tarampampam/error-pages/latest?maxAge=30
 [link_releases]:https://github.com/tarampampam/error-pages-docker/releases
 [link_commits]:https://github.com/tarampampam/error-pages-docker/commits
 [link_changes_log]:https://github.com/tarampampam/error-pages-docker/blob/master/CHANGELOG.md
@@ -91,3 +94,4 @@ This is open-sourced software licensed under the [MIT License][link_license].
 [link_build_status]:https://travis-ci.org/tarampampam/error-pages-docker
 [link_create_issue]:https://github.com/tarampampam/error-pages-docker/issues/new
 [link_license]:https://github.com/tarampampam/error-pages-docker/blob/master/LICENSE
+[link_docker_build]:https://hub.docker.com/r/tarampampam/error-pages/