CI: add Debian 11 jobs

.gitlab-ci.yml

@@ -29,6 +29,27 @@ debian10:tagged-build:
   rules:
     - if: '$CI_COMMIT_TAG  =~ /^Release_[0-9]+\.[0-9]+\.[0-9]+$/'
 
+debian11:build:
+  extends: .make_in_docker
+  stage: build
+  variables:
+    MAKE_TARGET: "build"
+    CI_DISTRO_TARGET: "debian11"
+    DEBIAN_FRONTEND: "noninteractive"
+  rules:
+    - if: '$CI_COMMIT_TAG  !~ /^Release_[0-9]+\.[0-9]+\.[0-9]+$/'
+
+debian11:tagged-build:
+  extends: .make_in_docker
+  stage: build
+  variables:
+    MAKE_TARGET: "build"
+    CI_DISTRO_TARGET: "debian11"
+    DEBIAN_FRONTEND: "noninteractive"
+    TAGGED_BUILD: "true"
+  rules:
+    - if: '$CI_COMMIT_TAG  =~ /^Release_[0-9]+\.[0-9]+\.[0-9]+$/'
+
 # CentOS
 
 centos8:build: