diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b37c2d1d..00d1297b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,7 +10,7 @@ on: [push, pull_request]
 
 jobs:
   lint-shellcheck:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - name: Checkout
         uses: actions/checkout@v2
@@ -21,7 +21,7 @@ jobs:
           ./run-tests.sh --check-shellscript
 
   docs-sphinx:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - name: Checkout
         uses: actions/checkout@v2
@@ -43,7 +43,7 @@ jobs:
         run: ./run-tests.sh --check-sphinx
 
   format-prettier:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - name: Checkout
         uses: actions/checkout@v2
@@ -60,7 +60,7 @@ jobs:
         run: ./run-tests.sh --check-prettier
 
   js-tests:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - name: Checkout
         uses: actions/checkout@v2
@@ -76,11 +76,20 @@ jobs:
       - name: Run javascript tests
         run: ./run-tests.sh --check-js-tests
 
+  lint-dockerfile:
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Check Dockerfile compliance
+        run: ./run-tests.sh --check-dockerfile
+
   docker-build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - name: Checkout
         uses: actions/checkout@v2
 
-      - name: Build docker image
+      - name: Build Docker image
         run: ./run-tests.sh --check-docker-build
diff --git a/Dockerfile b/Dockerfile
index 3590b76c..45a42960 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,11 +1,12 @@
 FROM node:12 as react-build
 WORKDIR /code
 COPY . /code
+# hadolint ignore=DL3003
 RUN cd reana-ui && \
     yarn && \
     yarn build
 
-FROM nginx
+FROM nginx:1.19
 COPY --from=react-build /code/reana-ui/build /usr/share/nginx/html
 COPY nginx/reana-ui.conf /etc/nginx/conf.d/default.conf
 EXPOSE 80
diff --git a/run-tests.sh b/run-tests.sh
index 3da03f02..9f60b617 100755
--- a/run-tests.sh
+++ b/run-tests.sh
@@ -28,6 +28,10 @@ check_js_tests () {
     cd reana-ui && yarn && yarn test --ci --passWithNoTests && cd ..
 }
 
+check_dockerfile () {
+    docker run -i --rm hadolint/hadolint < Dockerfile
+}
+
 check_docker_build () {
     docker build -t reanahub/reana-ui .
 }
@@ -37,6 +41,7 @@ check_all () {
     check_sphinx
     check_prettier
     check_js_tests
+    check_dockerfile
     check_docker_build
 }
 
@@ -52,6 +57,7 @@ do
         --check-sphinx) check_sphinx;;
         --check-prettier) check_prettier;;
         --check-js-tests) check_js_tests;;
+        --check-dockerfile) check_dockerfile;;
         --check-docker-build) check_docker_build;;
         *)
     esac